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정보검색

소장정보 검색

국회도서관 홈으로 정보검색 소장정보 검색
결과 내 검색 동의어 포함
결과 내 검색 동의어 포함

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목차

I. 서론 8

1.1. 연구배경 및 필요성 8

1.2. 기술동향 및 연구동향 12

1.3. 연구 목적 14

II. 정확하고 정밀한 장력 제어 시스템 15

2.1. 정확한 장력 제어가 필요한 이유 15

2.1.1. 고 장력 & 저 장력으로 인해 생기는 문제 19

2.1.2. 장력저하 이유 22

2.2. 롤투롤 이송시스템 모델링 26

2.3. 장비 설명 28

2.4. 실험방법 설명 35

2.5. 실험결과 36

III. 수동과 능동 보상 시스템을 이용한 중첩인쇄 41

3.1. 중첩인쇄 실험방법 및 설명 41

3.2. 수동 보상 44

3.3. 능동 보상 시스템 47

3.4. 실험 결과 49

IV. 결론 51

참고문헌 53

ABSTRACT 56

표목차

Table 1. Printing method for printed electronics 10

Table 2. Driving tension according to material 19

Table 3. Tension reduction rate by friction coefficient and angle 24

Table 4. Predicted value by section 27

Table 5. Error for passive compensation 45

그림목차

Fig.1. Screen printing 11

Fig.2. Bottom gate TFT device 12

Fig.3. PET Young's modulus 16

Fig.4. PI Young's modulus 17

Fig.5. Factors for reducing tension 23

Fig.6. R2R screen printing modeling 27

Fig.7. Schematic of equipment 28

Fig.8. Block diagram of feedback control(printing section) 30

Fig.9. Block diagram of feedback control(rewider section) 32

Fig.10. Screen printing unit 3D drawing 34

Fig.11. Graph of one condition(3 kgf / 5 kgf) 37

Fig.12. Load cell #1 tension data 38

Fig.13. Load cell #3 tension data 39

Fig.14. Load cell #2 tension data 40

Fig.15. Overlay printing process 42

Fig.16. Necessity of Center & θ Align 43

Fig.17. The way of measuring register error 44

Fig.18. Register error of passive compensation 46

Fig.19. Flow chart for tension active compensation 48

Fig.20. Schematic of active compensation control system 49

Fig.21. Compensated tension data during printing 50

Fig.22. Register error of passive & Active compensation 51

사진목차

Photo 1. Flexible display(left) and RFID(right) 8

Photo 2. Coating film bent by residual stress 21

Photo 3. Idle roller image 25

Photo 4. In-feeder(top) & Out-feeder(bottom) 28

Photo 5. Motor(left) & Powder clutch(right) 31

Photo 6. Screen printing unit 33

Photo 7. Scrapper(top) & Squeegee(bottom) 34

Photo 8. CCD Camera 42

초록보기

We can easily find products with printed electronics technology around us. RFID tags, for example, are very easy to find. It is also used in many places, such as flexible display and solar panels. Such electronic products have a multi-layer structure, not a single-layer structure. In order to make a multi-layered circuit , it is necessary to perform overlay printing. The superposition accuracy in electronic circuits is directly related to the performance of the product. In addition, if the overlay precision is improved, the number of defective products can be reduced, which can benefit from an economical part. In this study, a roll-to-roll system that can accurately control tension was constructed for precise overlay printing. Then, the amount of deformation of the stretched film due to the tension was measured using a vision system. Also, errors in printing were analyzed and measured to change the design of the screen mask. Next, a system for compensating the deformation of the film was constructed by changing the tension using the tension control system previously constructed to compensate for the deformation of the film depending on the temperature. In conclusion, we measured the overlay precision of the printed result.

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