Earticle

According as the latest printing technology is converted from analogue to digital, life cycle of a printing technology is shortened and the existent printing companies were faced always in a new technology. Specially, way of foreign countries export opened because globalization of printing market is accelerated. But, printing buyers of advanced nation require standard printing process control. fect at product process step. Emphasized in IPA technical conference for past several years tendency about graphic art color proofing and technical analysis and comparison going through Color Proofing RoundUP. These researchers have developed a color management technology. A specially developed printing technology and reference characterization data brought certain high quality elevation in a graphic art proofing technology. When excessive GCR method application supervise printing, width of color conversion necks by requiring a lot of color conversions than proofing. But, these point is lacking relatively than a lot of effects that GCR gives. Therefore, correct interests of GCR algorithm and verification step to forecast beforehand result about actuality application are positively necessary. Therefore, this research forced into input file which is applied with different levels from input to print for printing optimization that consider standard printing with eco-friendly by method to solve these problem. And experimented using manuscript who GCR level is applied as is different in each field, and analyzed the result. Also, it is verification method by step to last printing from input file that solve been the various quality who generate in actuality field through these analysis result. ICC color management confirmed printing optimization process applying GCR algorithm improved to base.

최근 보안 인쇄 제품은 은행권 및 상품권, 증․채권 등 유가증권의 인쇄뿐만 아니라 상업적인 목적의 인쇄에 있어서도 매우 많은 수요가 증대되고 있으며 이러한 보안 인 쇄는 망점이 아닌 위조 방지 요소로서의 기능을 갖는 미세선(superfine line)의 재현이 가능한 인쇄가 요구된다. 즉, 화선이 선으로 구성 선화 인쇄가 필연적이라 볼 수 있다. 따라서 본 연구에서는 선화 인쇄에 적합한 인쇄판 및 인쇄물에서의 위조 방지 기능 을 부여할 수 있는 미세선 재현 인쇄물을 얻기 위한 인쇄판 내구성 향상에 관해 고찰 하였다.

For the latest security printing product, bank bill and gift certificate printing that very many demands are increased even if there is in printing of commercial objective as well as printing of securities such as bond and these security printing is possible reappearance of fine (Superfine line) that have function as anti-counterfeiting elements that half-tone dot is not is required. That is, line can think that composition line drawing printing is necessary in precedence. Therefore, in this study, the improvement of the durability of the printing plate for obtaining the printed matter for the fine line reproduction which can provide the anti-fake function in the print suitable for the line printing is discussed.

One of the important roles of worflow is color management. In general, color management technique, which is called CMS(color management system), is a method to solve problems that show different characteristics of color regeneration in output devices, and the characteristics of output devices is created in data file called ICC(International Color Consortium) profile. In addition, ICC profile is used to manage color in workflow, and includes other functions, process management and printing quality management. In domestic printing market, workflow is in the pipeline at rapid speed along with CTP, and use of ICC profile required for color management is also in rapid progress. Therefore, this paper produced optimal ICC profile through experiment from the work of linearizing devices used in each field to color conversion work. Moreover, the paper confirmed how ICC profile will be used in printing field. In the profiling experiment based on hardcopy proofing, photographed copy and chrominance were compared by printing out in proof the image created through application and color conversion with the use of camera profile and proof profile produced in colorimetric method. By evaluating if color is expressed accurately from input to output through colorimetric color conversion experiment as above, the paper intended to propose color management method using optimal profile in printing process.

The color reproduction of digital still camera does not, in general, match those of the final prints. Because color gamut of these devices is different, it is therefore necessary to take account of a way to match. The way uses the optimized profile to print an image. This paper proposed a way to create the input profile of digital still camera for standardization printing process. The results of proposed way showed that for input profiles equivalent, good results relatively. In this paper, an experiment was done where the illumination sources used as the standard illumination 5200K and illuminated at a 45° angle in the best illumination efficiently. The white balance was in mode 'custom':aperture F11, exposure time 1/60s, ISO50, focal length 80mm. The images were exported and saved as 16bit RGB tiff(AdobeRGB, sRGB, ProphotoRGB) images. To do the test, the RGB values of the RGB tiff images are processed through the ICC input profile to arrive at processed CIEL*a*b* values. A profiling tool such as ProfileMaker 5.0 and Monacoprofile 4.8 are used to do this. The processed CIEL*a*b* values are compared to the reference CIEL*a*b* values and these two values are used to calculate a ΔE.

For the color offset printing, it starts with input of data. The past days, drum scanner or flat scanner used to input of data, but now it changes gradually into using of digital camera because digital camera become popular. The high quality digital camera saves as a data(RAW format), sRGB which have built in digital camera, or Adobe RGB format. sRGB of ICC(International Color Consortium) profile is a standard color gamut of digital camera. Distribution of color gamut in sRGB is less than Adobe RGB have a distribution in ICC profile. sRGB also can not be expressed in some specific part, because distribution of color gamut in sRGB is not able to cover all parts in ICC Profile of international standards CMYK. It is more popular to use Adobe RGB than sRGB to do high quality offset printing and software basis color setting in Europe and Japan. In spite of this data basis, there is a difficulty of doing color correction between the color proofing prints and the final prints. To see how the software color setting effects to RGB data, this thesis will use Gretag Macbeth ColorChecker 24 patch which has the most general natural color chart to compare sRGB and Adobe RGB to check the differences of color changes. It will use the several factors that came out from the process of making ICC Profile to figure out the optimum In-house profile. It also compares the differences of using matt paper and glossy paper to do best quality color proof offset printing, and how the Rendering Intent effects the proof print.

Producing printing plate is essential progress to do offset printing. In this Film-less period, the more PS plate becomes extinct, the more the age of the Plate-Making of Exposure declines the place to stand. To do offset printing, the CTP (Computer to Plate) is taking a place of PS plate that covers speed, quality and economical problems. The biggest advantage of using CTP is that laser directly goes to the plate, thus there are no dust from the Plate-Making of Exposure. It is also theoretically able to print 2001pi~3001pi as well as print 1751pi, because it has over 2400dpi resolution. The high quality printing could be available inside of the country, if printing machine keeps the optimum condition in offset printing. The CTP has many advantages, however there is a difficulty for the operators to preserve the equipment. The actual circumstance is that they cannot make a decision about how many dots need to be generated, and also it is necessary to know how to establish the setup at RIP on CTP to make the optimum condition output. If offset printing machine keeps the optimum condition, it would be able to print up to high quality printing however it is hard to comment what is the optimum condition for the printing machine. Anyone could say easy subjectively that machine is in the optimum condition, however it is objectively hard to estimate by number. In this research GATF / Plate Test target used to analyze the image and to make numerical value of the optimum condition of the CTP. It also used GATF / The sheep fed test printing 5.0 to know the density of the color representation, dot gain and gray balance for the optimum condition of the print machine. The purpose of this research is to represent the ISO 12647-2 which is the international standard with domestic printing equipments.

In this paper, an experiment was done where the input(scanner, digital still camera) and monitor(CRT, LCD) device used the linear multiple regression and the GOG (Gain-Offset-Gamma) characterization model to perform a color transformation. Also to color conversion method of the digital printer it used the LUT(Look Up Table), 3dimension linear interpolation and a tetrahedron interpolation method. The results are as follows. From color reappearance of digital printing case of monitor, the XYZ which it converts in linear multiple regression of input device it multiplied the inverse matrix, and then it applies the inverse GOG model and after color converting the patch of the result most which showed color difference below 5 at monitor RGB value. Also, The XYZ which is transmitted from the case input device which is a printer it makes at LAB value to convert an extreme, when the LAB value which is converted calculating the CMY with the LUT and tetrahedral interpolations the color conversion which considers the black quantity was more accurate.

Internal bonding strength of printing paper was increased with sea-algae pulp treatment. Spacially, 9% contents sea-algae pulp treatment in the hardwood pulp are more effective than in the softwood pulp. Most effective mixture ratio of the raw matrials for improvement of the internal bonding strength are softwood pulp 30%, hardwood pulp 70%, sea-algae pulp 9%. Internal bonding strength is effective in more sea-algae pulp contents and softwood pulp contents and wetness.

Proofing is one of the inspection operations of printing and can be considered a process control step. The three main kinds of proofs are press proofs, photomechanical proofs, and digital proofs. Photomechanical and digital proofs are also generally refered to as "off-press" proofs. Off-press color proofs are more economical than press proofs. Digital proofs offer fast production time along with a much lower cost per page. Hard-copy digital proofs can be output using thermal transfer printers, ink jet printers, and color laser copiers, as well as dye sublimation and electrophotographic technology. Ink jet method is commonly using because of the reasonal price. But ink jet system is difficult to reproduce an exact color proof. This research was carried out for the purpose of optimization of ink jet color proofing, using two kinds of ink jet printers with 6 colors (C, M, Y, K, mC, mM) and 4 colors (C, M, Y, K) system.

In this study, we investigated the optimal conditions for 3D structure printing of alternative fats that have the textural properties of lard using beeswax (BW)-based oleogel by a statistical analysis. Products printed with over 15% BW oleogel at 50% and 75% infill level (IL) showed high printing accuracy with the lowest dimensional printing deviation for the designed model. The hardness, cohesion, and adhesion of printed samples were influenced by BW concentration and infill level. For multi-response optimization, fixed target values (hardness, adhesiveness, and cohesiveness) were applied with lard printed at 75% IL. The preparation parameters obtained as a result of multiple reaction prediction were 58.9% IL and 16.0% BW, and printing with this oleogel achieved fixed target values similar to those of lard. In conclusion, our study shows that 3D printing based on the BW oleogel system produces complex internal structures that allow adjustment of the textural properties of the printed samples, and BW oleogels could potentially serve as an excellent replacement for fat.

The advantage of ceramic ink-jet printing technology is the accurate and fast printing process of digital images for various products. For digital ink-jet printing applications, ceramic ink requires proper viscosity and surface tension, along with dispersion stability of the inorganic pigments. The purpose of this study is the formulation of an environment-friendly ceramic ink with a water-based system; using nano-sized $CoAl_2O_4$ pigment as a raw material, ink should have dispersion stability to prevent nozzle clogging during ink-jet printing process. In addition, the surface tension of the ceramic ink was optimized with the polysiloxane surfactant according to the surface tension requirement (20 - 45 mN/m) for ceramic ink-jet printing; by adjusting the viscosity with poly ethylene oxide, jetting behavior of the ceramic ink was investigated according to changes in the physical features through drop watcher measurement.

In this paper, we have studied about the optimum fabrication condition of the printed Indium Tin Oxide (ITO) layers for the electrical resistance-type sensor application. We have investigated on the substrates surface treatments, mixing ratio of organic binder/ITO powder, and viscosity of the printing paste to determine the optimum condition of the screen printed ITO layer. Also, we found that the printing condition is closely related with the sensor performance. To know the feasibility of printed ITO layer as an electrical resistance-type sensor, we have fabricated the ITO sensors with a printed and sputtered ITO layers. The printed ITO films revealed $10^2$ times higher sensitivity than the sputtered ITO layer. Also, the sputtered ITO layer exhibited an operating temperature of $127^{\circ}C$ at the operating voltage of 5 V. While, in case of the printed ITO layer showed the operating temperature of $27.6^{\circ}C$ in high operating voltage of 30 V. We found that the printed ITO layer is suitable for the various sensor applications.

본 연구에서는 주파수 선택 표면(Frequency Selective Surface, FSS) 제작을 위한 스크린 프린팅 공정에서 우수한 재현성과 정밀한 면저항 제어를 달성하기 위한 공정 최적화 전략을 제안하였다. 이를 위해, 주요 공정 변수를 스크린 마스크의 메시 수(mesh count)와 에멀전 두께, 스퀴지 속도, 열처리 온도로 설정하고, 각 변수 변화가 잉크 전사 거동과 전극의 형상 및 전기적 특성에 미치는 영향을 분석하였다. 스크린 마스크 조건에 따라 최소 선폭 500 ㎛까지 안정적인 형상 재현성이 확보되었으며, 전극 두께는 선폭 500 ㎛에서 8.85-22.81 ㎛ 범위로 형성되었다. 이에 따라 면저항은 17.09-37.44 Ω/sq 범위에서 제어가 가능하였다. 또한 스퀴지 속도가 증가할수록 전극 두께가 증가하고 면저항이 감소하는 경향을 보였으며, 열처리 온도가 상승할수록 전도성 입자 간 퍼콜레이션 네트워크가 강화되어 면저항이 추가적으로 감소하였다. 최적 공정 조건을 적용하여 제작한 크로스 다이폴 FSS 필름은 평균 25.04±1.27 Ω/sq(목표 25 Ω/sq)의 면저항을 나타냈으며, 전자기 시뮬레이션 결과와 free-space measurement system(FSM) 측정 결과가 잘 일치함을 확인하여 최적화된 공정 조건의 유효성을 검증하였다.

This study proposes an optimization of the screen-printing process to achieve high reproducibility and precise sheet resistance control in the fabrication of frequency selective surface (FSS) structures. The key process parameters, including the mesh count and emulsion thickness of the screen mask, squeegee speed, and annealing temperature, were systematically investigated to analyze their effects on ink transfer behavior and the morphological and electrical properties of printed electrodes. Pattern stability and reproducibility were achieved down to a minimum line width of 500 ㎛ depending on the screen mask parameters. The electrode thickness for a line width of 500 ㎛ ranged from 8.85 to 22.81 ㎛, resulting in a controllable sheet resistance range of 17.09-37.44 Ω/sq. In addition, as the squeegee speed increased, the electrode thickness increased while the sheet resistance decreased. As the annealing temperature increased, the sheet resistance further decreased due to the enhanced percolation network between conductive particles. The cross-dipole FSS film fabricated under the optimized process conditions exhibited an average sheet resistance of 25.04±1.27 Ω/sq (target: 25 Ω/sq). The measured electromagnetic response closely matched the simulated results, confirming the validity of the optimized process conditions.

본 연구에서는 3D 객체의 수직 방향(upright orientation)과 오버행(overhang) 면적을 고려하는 3D 프린팅 방향 최적화 방법을 제안한다. 모든 메시 법선들을 세 그룹으로 분류함으로써 객체의 수직방향을 계산한 후, 객체의 무게 중심과 3D convex hull을 사용하여 세 개의 후보 방향을 결정한다. 각 후보 방향에 대하여 오버행 메시 면적을 계산하고 최소 면적을 갖는 후보를 최종 프린팅 방향으로 결정한다. 후보 방향들을 적용하여 회전시킨 모델을 Cura에서 로드하여 프린팅 시간을 가측정한 결과, 제안 방법에 의해 최적화된 방향이 가장 짧은 시간이 소모되는 것으로 나타났다.

3D 프린팅 기술은 다양한 산업분야에서 개념모델 및 기능성 시제품을 제작하는데 많이 응용되고 있지만, 3D 프린팅 소재 및 제작된 제품 신뢰성 등의 여러 가지 이유로 상용화 제품으로 적용되는 데 한계가 존재한다. 본 논문에서는 3D 프린팅 기술을 이용한 산업적 응용분야 중 하나로 발전소 저탄장에 사용되는 풀 코드 스위치 모듈의 부품들 중 잦은 돌발 상황으로 인해 파손이 자주 발생하는 허브 구동부와 레버 고정부 부품들에 대해 현장에서 작업자들이 단기 대체부품으로 적용이 가능하도록 하는 부품 최적 설계 및 FDM 방식 3D 프린팅 제조공정기술에 대한 연구결과를 제시하였다. 3D 프린팅 기술의 경우 소재 적용에 있어서 한계가 존재하므로, 본 논문에서는 구조 최적화 설계를 통해 구조 안정성을 확보하는 방안에 대해 연구를 수행하였다. 허브 구동부 부품에 대해 내부 구조 형상 및 구조 설계 변수 최적화를 수행하여 좌측구동모드에서는 안전계수가 153.67% 증가한 1.243을 확보할 수 있었으며, 우측구동모드에서는 404.96% 증가한 3.156을 확보할 수 있었다. 레버 고정부 부품의 경우, 반복적인 스위칭 구동에 의한 굽힘 모멘트로 인해 발생하는 파손을 최소화하기 위해 구조 최적화 설계를 수행하여 26% 증가한 구조 안전계수(7.52)를 확보할 수 있었다. 본 연구를 통해 3D 프린팅 기술을 단기 대체부품 제조공정에 적용함에 있어서 소재 최적화를 통한 설계보다는 3D 프린팅 공정의 적층특성을 활용한 구조적 최적화 설계기법 이 더욱 유연한 결과를 도출할 수 있음을 확인할 수 있었다.

Recently, 3D printing technology has been applied to make a concept model and working mockup of an industrial application. On the other hand, this technology has limited applications in industrial products due to the materials and reliability of the 3D printed product. In this study, the components of a full cord switch module are proposed as a case of a 3D printed component that can be used as a substitute for a short period. These are hub-driven and lever lockup components that have the structural characteristics of breaking down frequently in the emergency operating status. To ensure the structural strength for a substitute period, research of structure optimization was performed because 3D printing technology has a limitation in the materials used. After optimizing the structure variables of the hub-driven component, reasonable results can be drawn in that the safety factors of the left and right switching mode are 1.243 (${\Delta}153.67%$) and 3.156 (${\Delta}404.96%$). The lever lockup component has a structural weak point that can break down easily on the lockup-part because of a cantilever shape and bending moment. The rib structure was applied to decrease the deflection. In addition, optimization of the structural variables was performed, showing a safety factor of 7.52(${\Delta}26%$).

In this study, an additive manufacturing (AM) optimization process experiment was conducted using high-hardness metal powders (AISI M4) that can be used for mold repairs. The process variables applied in the experiment were the laser power, laser head moving speed, and powder feed rate, and the manufacture cross section was analyzed through one-pass manufacturing. The AM efficiency was evaluated for each process with respect to the layer height, dilution ratio, and global energy density. In the case of the layer height, the AM efficiency was good under the condition of the laser output of 500 W. In the case of the dilution ratio, the AM efficiency was good under the conditions of a powder feed rate of 6 g/min and laser head moving speed of 500 mm/min. Finally, the GED values of the process variables applied in this experiment were calculated, and the AM efficiency was excellent at values between 60 and 108 J/mm2.

전기자동차 시장이 성장함에 따라 배터리 효율을 증가시키기 위해 차량 경량화 이슈가 대두되고 있다. 이에 전기자동차 배터리 모듈을 보호하는 배터리 모듈 커버를 기존 알루미늄 소재에서 알루미늄 대비 절반 수준의 무게를 가지는 고강도/고내열성 고분자 복합소재로 대체하고자 한다. 또한 복잡한 형상에 대한 제약이 없고, 다품종 소량생산에 유리한 3D 프린팅 기술을 접목하여 기술 변화가 빠른 초기 전기자동차 시장에 대응하고자 한다. 복합소재 역학에 기반하여 압출기를 통해 가공한 단섬유 GF(glass fiber)/PC(polycarbonate) 복합소재 내 유리섬유의 임계길이(critical length)가 453.87 ㎛임을 도출하였고, 사이드 피딩(side feeding) 방식의 가공법을 택함으로써 기존 365.87 ㎛이었던 잔류섬유길이를 향상시킴과 동시에 분산성을 향상시켰다. 이에 30 wt%의 GF가 함유된 GF/PC 복합소재로 인장강도(tensile strength) 135 MPa, 탄성계수(Young's modulus) 7.8 MPa의 최적의 물성을 구현하였다. 또한 3D 프린팅 필라멘트가 상용 필라멘트 규격인 두께 1.75 mm, 표준편차 0.05 mm를 만족하기 위해서 필라멘트 압출 조건(온도, 압출속도)을 최적화하였다. 제작된 필라멘트를 통해 기공률을 최소화하며 강도를 최대화하고, 동시에 생산성 향상을 위해 프린팅 속도를 최대화하는 다중 최적화 문제를 통해 3D 프린팅 공정조건(온도, 프린팅 속도)을 최적화하였고, 이로써 기존 상용화 되어있는 동일 소재 필라멘트 대비 인장강도 11%, 탄성계수 56%가 향상된 결과를 얻었으며, 출력물의 후처리(post-process)를 통해 후처리 전 대비 인장강도 5%, 탄성계수 18%를 추가로 향상시켰다. 끝으로 유한요소해석(finite element analysis, FEA) 기법을 활용하여 전기자동차 배터리 모듈 커버의 시험 규격(ISO-12405)의 Mechanical Shock test의 기준을 만족하도록 배터리 모듈 커버의 구조를 최적화하였고, 이로써 배터리 커버 시험규격을 만족하면서 동시에 알루미늄을 사용했을 때 대비 37%의 경량화를 달성하였다. 해당 연구 결과 및 연구 방법을 활용하여 향후 다양한 분야에 고분자 복합소재 3D 프린팅 기술이 활용될 수 있을 것으로 기대된다.

As the electric vehicle market grows, there is an issue of light weight vehicles to increase battery efficiency. Therefore, it is going to replace the battery module cover that protects the battery module of electric vehicles with high strength/high heat-resistant polymer composite material which has lighter weight from existing aluminum materials. It also aims to respond to the early electric vehicle market where technology changes quickly by combining 3D printing technology that is advantageous for small production of multiple varieties without restrictions on complex shapes. Based on the composite material mechanics, the critical length of glass fibers in short glass fiber (GF)/polycarbonate (PC) composite materials manufactured through extruder was derived as 453.87 ㎛, and the side feeding method was adopted to improve the residual fiber length from 365.87 ㎛ and to increase a dispersibility. Thus, the optimal properties of tensile strength 135 MPa and Young's modulus 7.8 MPa were implemented as GF/PC composite materials containing 30 wt% of GF. In addition, the filament extrusion conditions (temperature, extrusion speed) were optimized to meet the commercial filament specification of 1.75 mm thickness and 0.05 mm standard deviation. Through manufactured filaments, 3D printing process conditions (temperature, printing speed) were optimized by multi-optimization that minimize porosity, maximize tensile strength, and printing speed to increase the productivity. Through this procedure, tensile strength and elastic modulus were improved 11%, 56% respectively. Also, by post-processing, tensile strength and Young's modulus were improved 5%, 18% respectively. Lastly, using the FEA (finite element analysis) technique, the structure of the battery module cover was optimized to meet the mechanical shock test criteria of the electric vehicle battery module cover (ISO-12405), and it is satisfied the battery cover mechanical shock test while achieving 37% lighter weight compared to aluminum battery module cover. Based on this research, it is expected that 3D printing technology of polymer composite materials can be used in various fields in the future.

적층 제조(AM) 기반 3D 프린팅은 설계 자유도가 크고 공정 기간을 획기적으로 단축할 수 있어 우주·항공, 모빌리티, 전자기기 등 다양한 산업 분야에서 활발히 연구되고 있다. 특히 단일 재료를 넘어 다기능성을 부여한 복합소재 3D 프린팅이 주목받고 있는데, 나노 필러 함량 변화에 따른 물성 변동이 크기 때문에 소재-공정 동시 최적화가 중요한 과제로 대두되고 있다. 본 연구에서는 열가소성 폴리우레탄(TPU) 매트릭스에 탁월한 열전 특성을 지닌 탄소나노튜브(CNT)를 첨가하여 TPU/CNT 복합 필라멘트를 제조하였다. 이어, 용융 적층 모델링(FDM) 공정에 맞추어 필라멘트의 용융 유동 특성을 분석하여, TPU/CNT 복합소재의 최적 프린팅 조건을 확립하였다. 그 결과, CNT 함량 20 wt%에서 전기전도도 600 S/m를 달성하였다. 이는 열전 기능성 복합소재를 활용한 차세대 유연 열전 소자 개발에 기여할 것으로 기대된다.

Additive manufacturing (AM) affords unprecedented design flexibility and markedly shorter production cycles, spurring intense investigation in aerospace, transportation, and consumer-electronics applications. Current efforts center on printing multifunctional composites, where even slight changes in nanofiller loading can dramatically alter properties-necessitating the concurrent optimization of material formulation and processing parameters. In this study, we fabricated TPU/CNT composite filaments by incorporating CNTs with superior thermoelectric characteristics into a TPU matrix. We systematically characterized the melt rheology of the resulting filaments and correlated it with processing parameters to establish optimal conditions for FDM. Under these refined conditions, a 20 wt% CNT loading yielded an electrical conductivity of 600 S/m, demonstrating the feasibility of printing highly conductive, thermoelectric-capable architectures. It is expected that this will contribute to the development of next-generation flexible electronic and energy devices utilizing thermoelectric functional composite materials.

공압(air pulsation)을 이용한 토출 원리를 갖는 노즐 프린팅 방식의 디스펜서(dispenser)는 공기의 압력을 액체에 전달하여 일정한 양의 액체를 밀어내는 방식으로 작동한다. 노즐 프린터는 점도(viscosity), 표면 장력(surface tension) 등 액체의 특성에 따라 에너지를 정밀하게 제어하여 정확한 도포 위치와 정량의 액체를 정밀하게 도포할 수 있다는 장점을 갖는다. 본 연구는 고해상도 비전 정렬(alignment) 시스템을 갖춘 노즐프린터를 이용한 인쇄 공정 순서를 소개하고 도포 품질에 영향을 미치는 핵심 공정 변수(분사 압력, 팁 높이, 이동 속도)에 따른 프린팅 패턴들을 비교하였다. 실험 결과, 20 mm/s의 이동 속도와 0.2 mm의 노즐 높이 조건에서 2.14 ㎛의 도포 표준편차를 도출해 가장 안정적이고 균일한 도포 품질을 얻을 수 있었다. 이러한 실험을 통해 도포 폭, 균일성, 단절 여부 등을 기준으로 최적화 조건을 도출하였으며, 이러한 조건이 정밀 제조 공정에 미치는 효과를 논의하고자 한다.

Nozzle-printing dispensers, which utilize air pulsation as a dispensing principle, operate by transmitting air pressure to the liquid to push a constant amount of liquid. Nozzle printers have the advantage of precisely controlling energy based on liquid properties, such as viscosity and surface tension, enabling the precise application of liquid at specific locations and quantities. This study introduces a printing process sequence using a nozzle printer equipped with a high-resolution vision alignment system. It compares printing patterns according to key process variables (jet pressure, tip height, and travel speed) that affect coating quality. Experimental results showed that a coating standard deviation of 2.14 ㎛ was achieved at a moving speed of 20 mm/s and a nozzle height of 0.2 mm, resulting in the most stable and uniform coating quality. Through these experiments, optimal conditions were identified based on factors such as coating width, uniformity, and presence of discontinuity, and the effects of these conditions on the precision manufacturing process are discussed.