KR101812713B1 - 전자파 차폐 시트, 전자파 차폐성 배선 회로 기판 및 전자 기기 - Google Patents
전자파 차폐 시트, 전자파 차폐성 배선 회로 기판 및 전자 기기 Download PDFInfo
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- KR101812713B1 KR101812713B1 KR1020177019793A KR20177019793A KR101812713B1 KR 101812713 B1 KR101812713 B1 KR 101812713B1 KR 1020177019793 A KR1020177019793 A KR 1020177019793A KR 20177019793 A KR20177019793 A KR 20177019793A KR 101812713 B1 KR101812713 B1 KR 101812713B1
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- electromagnetic wave
- wave shielding
- adhesive layer
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Abstract
Description
도 2는, 본 실시형태와 관련한 전자파 차폐 시트의 일 예를 나타내는 모식적인 절단부 단면도이고,
도 3은, 본 실시형태와 관련한 전자파 차폐성 배선 회로 기판의 일 예를 나타내는 모식적인 절단부 단면도이고,
도 4은, 제 1 변형 예에 관련한 전자파 차폐성 배선 회로 기판의 일 예를 나태는 모식적인 절단부 단면도이고,
도 5은, 제 2 변형 예에 관련한 전자파 차폐성 배선 회로 기판의 일 예를 나태는 모식적인 절단부 단면도이고,
도 6은, 제 3 변형 예에 관련한 전자파 차폐성 배선 회로 기판의 일 예를 나타내는 모식적인 절단부 단면도이고,
도 7은, 제 4 변형 예에 관련한 전자파 차폐성 배선 회로 기판의 일 예를 나타내는 모식적인 절단부 단면도이고,
도 8은, 실시 예 및 비교 예에 관련한 프린트 배선판의 주면 측의 모식적 평면도이고,
도 9는, 실시 예 및 비교 예에 관련한 프린트 배선판의 이면 측의 모식적 평면도이고,
도 10은, 실시 예 및 비교 예에 관련한 전자파 차폐 시트가 구비된 프린트 배선판의 모식적 평면도이고,
도 11은, 도 10의 XI-XI 절단부 단면도이고,
도 12는, 도 10의 XII-XII 절단부 단면도이다.
2,72; 도전층
3,73; 절연층
7; 프린트 배선판
8; 전자파 차폐 시트가 구비된 프린트 배선판
10,61,62; 전자파 차폐 시트
20; 프린트 배선판(부품)
21; 기판
22,57b; 절연성 접착제 층
23,57a; 폴리이미드 필름
24; 그라운드 패턴
25; 배선
31; 비아
32,33; 범프
34; 외부 어스
35; 도전성 페이스트
41; 그라운드 비아
50; 폴리이미드 필름
51; 스루홀
52; 구리 도금막
53; 신호 배선
54; 그라운드 배선
55; 그라운드 패턴
56; 이면측 그라운드 패턴
57; 커버 레이
58; 돌출부
60; 개구부
Claims (10)
- 전자파를 방출하는 부품의 적어도 일부를 차폐하는 적층체로 이루어진 전자파 차폐 시트이며,
상기 적층체는,
상기 부품 위에 배치해서, 접합 처리를 행함에 따라 상기 부품과 접합되는 접착층과,
상기 접착층 위에 적층된 도전층과,
상기 도전층 위에 형성된 절연층을 구비하고,
상기 접착층은, 바인더 성분으로서,
(I)열 가소성 수지(A), 및
(II)열 경화성 수지(B)와 상기 열 경화성 수지(B)에 대한 경화성 화합물(C), 중 적어도 한쪽을 포함하며,
상기 접착층은, 도전성 필러를 더 함유하여, 이방(異方) 도전성을 나타내고,
상기 바인더 성분을 열 압착 처리한 후의 피막(X)이 아래의 (i) 및 (ii)를 만족시키는 전자파 차폐 시트:
(i)비유전율(比誘電率)이, 주파수 1GHz, 23℃에서 1~3이다.
(ii)유전정접(誘電正接)이, 주파수 1GHz, 23℃에서 0.0001~0.02이다.
- 제1항에 있어서,
열 경화성 수지(B)는 카르복실기 함유 수지를 포함하고,
경화성 화합물(C)로서, 에폭시 화합물을 포함하고, 그리고 유기 금속 화합물 및 이소시아네이트 화합물 중 적어도 한쪽을 포함하는 전자파 차폐 시트.
- 제1항에 있어서,
상기 접합 처리 후의 상기 접착층의 두께가 3~50㎛인 전자파 차폐 시트.
- 제1항에 있어서,
상기 도전성 필러가, 구상(球狀) 입자 및 덴드라이트 입자 중 적어도 한쪽에서 선택되는 전자파 차폐 시트.
- 제1항에 있어서,
상기 바인더 성분은, 상기 (II)을 포함하고,
상기 접착층의 열 경화 후의 피막(Y)에 있어서, 탄소 원자 수에 대한 질소 원자 수의 비율이 1~10%이며, 또 탄소 원자 수에 대한 산소 원자 수의 비율이 3~20%인 전자파 차폐 시트.
- 제1항에 있어서,
상기 바인더 성분은, 상기 (II)을 포함하고,
상기 접착층의 열 경화 후의 피막(Y)은, 카르복실기 및 수산기에서 선택되는 적어도 어느 기(基)를 포함하고,
상기 카르복실기를 포함할 경우에는, 탄소 수에 대한 카르복실기 수의 비율이 0.01~15%의 범위이며,
상기 수산기를 포함할 경우에는, 탄소 수에 대한 수산기 수의 비율이 0.5~20%의 범위에 있으며,
상기 탄소 수에 대한 카르복실기 수와 수산기 수의 합계가 35% 이하인 전자파 차폐 시트.
- 제1항에 있어서,
경화성 화합물(C)이 유기 금속 화합물을 함유하는 전자파 차폐 시트.
- 제1항에 있어서,
상기 도전층은 금속층인 전자파 차폐 시트.
- 배선 회로 기판 위에, 제1항 내지 제8항 중 어느 한 항에 기재된 전자파 차폐 시트가 접합된 전자파 차폐성 배선 회로 기판.
- 제1항 내지 제8항 중 어느 한 항에 기재된 전자파 차폐 시트가 접합된 전자 기기.
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