목록전체 글 (47)

electronics world

What is FMEA?

■. What is FMEA (Failure modes, effects, and criticality analysis) ? FMEA is one of the first systematic techniques for failure analysis. FMEA was developed by the U.S. Department of Defense and the first guideline is [MIL-P-1629] “Procedures for performing a failure mode, effects and criticality analysis” established on November 9, 1949 in the U.S. Military Standard. FMEA is most often used as ..
Analytical technology 2021. 9. 18. 10:55
Copper Characteristics

1. What is copper ? Copper is a metal with atomic number 29 and has good thermal and electrical conductivity, so it is used as a heat and electrical conductor such as boiler pipes and electric wires. It was also used as currency by making coins from Ni, Zn and alloys, and it is also used as a material for brass instruments because of its various tones depending on the alloy composition. Copper i..
Basic science 2021. 9. 18. 09:25
What is Copper clad laminate (CCL)?

1. CCL structure Copper clad laminate (CCL) is the most basic raw material for PCBs. The structure of the CCL is a structure in which copper clad is attached to one or both sides of an insulator such as glass fiber (FR4), paper, in the center. 2. Classification of CCL Paper phenol: It's a yellow PCB you can see on black and white TV. It is a material that is not available these days due to the t..
카테고리 없음 2021. 9. 3. 00:46
Copper clad laminate (CCL)은 무엇인가?

오늘은 카파를 절연체에 부착하여 CCL을 만드는 공법 3가지 라미네이킹 , 케스팅, 스퍼터링에 대해 알아 보겠습니다. 1. CCL 제조 공법 Copper clad laminate (CCL)는 PCB를 가장 기초적인 원자재입니다. CCL의 구조는 중앙에 유리섬유 (FR4), 종이 등의 절연체에 단면 또는 양면에 Copper clad를 부착한 구조 입니다. 2. CCL 의 종류 - 종이 페놀(Paper phenol) : 흑백 TV에서나 볼만한 누런 PCB 입니다. 저가제품 용도로 만드나 페놀의 유독성(낙동강 페놀 유출 사건) 때문에 요즘은 볼 수 없는 자재 입니다. 강도, 내습성 등 모든 특성이 취약 합니다. 요즘은 납떔 교육용으로나 볼 수 있는 자재 입니다. - CEM1, CEM3 : CEM1은 유리섬유와..
카테고리 없음 2021. 9. 2. 23:34
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