KR100299501B1 - 칩의 리드간 납땜불량 검사방법 - Google Patents
칩의 리드간 납땜불량 검사방법 Download PDFInfo
- Publication number
- KR100299501B1 KR100299501B1 KR1019980007624A KR19980007624A KR100299501B1 KR 100299501 B1 KR100299501 B1 KR 100299501B1 KR 1019980007624 A KR1019980007624 A KR 1019980007624A KR 19980007624 A KR19980007624 A KR 19980007624A KR 100299501 B1 KR100299501 B1 KR 100299501B1
- Authority
- KR
- South Korea
- Prior art keywords
- illumination
- image
- leads
- chip
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0269—Marks, test patterns or identification means for visual or optical inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8806—Specially adapted optical and illumination features
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N2021/95638—Inspecting patterns on the surface of objects for PCB's
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Claims (3)
- 칩에 연결된 복수개의 리드들과 복수개의 패드들을 각각 납땜으로 연결하여 구성된 인쇄 회로기판;상기 인쇄 회로 기판의 윗쪽에 설치되고 상기 기판을 조사하기 위하여 링형으로 구성된 제 1 조명;상기 인쇄 회로기판과 상기 제 1 조명 사이에 설치되고, 상기 기판을 조사하기 위하여 상기 제 1 조명보다 더 큰 링형으로 구성된 제 2 조명;상기 제 1 조명 및 제 2 조명에 의한 영상을 얻기 위한 카메라; 및상기 인쇄 회로기판, 제 1 조명, 제 2 조명, 및 카메라를 제어하기 위한 제어수단을 구비한 시스템의 칩의 리드간 납땜불량 검사방법에 있어서,상기 제 1 조명을 온하고, 상기 제 2 조명을 오프하여 제 1 영상을 얻는 단계;상기 제 1 조명을 오프하고, 상기 제 2 조명을 온하여 제 2 영상을 얻는 단계;상기 제 2 영상에서 상기 제 1 영상을 뺀 차영상을 구하는 단계;상기 차영상을 이용하여 복수개의 리드들의 이웃하는 두 리드간을 연결하는 양의 영역이 존재하는지를 판단하는 단계; 및상기 판단 단계를 만족하면 불량인 것으로, 만족하지 않으면 정상인 것으로 판단하는 단계를 구비한 것을 특징으로 하는 칩의 리드간 납땜불량 검사방법.
- 제 1 항에 있어서, 상기 제 1 영상은 경사면으로 구성된 상기 납땜 필렛부와 상기 리드의 절곡부는 음의 영역으로 나타나고, 수평면으로 구성된 리드 말단부와 어깨 및 패드 말단부는 양의 영역으로 나타나는 것을 특징으로 하는 칩의 리드간 납땜불량 검사방법.
- 제 1 항에 있어서, 상기 제 2 영상은 상기 납땜 필렛부와 납터치 부위 및 상기 리드의 절곡부는 양의 영역으로 나타나고, 상기 리드 말단부, 어깨부, 및 패드 말단부는 음의 영역으로 나타나는 것을 특징으로 하는 칩의 리드간 납땜불량 검사방법.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980007624A KR100299501B1 (ko) | 1998-03-07 | 1998-03-07 | 칩의 리드간 납땜불량 검사방법 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980007624A KR100299501B1 (ko) | 1998-03-07 | 1998-03-07 | 칩의 리드간 납땜불량 검사방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19990074197A KR19990074197A (ko) | 1999-10-05 |
| KR100299501B1 true KR100299501B1 (ko) | 2001-09-22 |
Family
ID=37528731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980007624A Expired - Fee Related KR100299501B1 (ko) | 1998-03-07 | 1998-03-07 | 칩의 리드간 납땜불량 검사방법 |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100299501B1 (ko) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2478501A (en) * | 2008-12-18 | 2011-09-07 | Nelson Stud Welding Inc | Turbine wheel and shaft joining processes |
| KR102649846B1 (ko) | 2023-10-06 | 2024-03-21 | 위더맥스(주) | 멀티 칩 패키지 내 칩 간 인터커넥션 결함 검사 장치 및 방법 |
-
1998
- 1998-03-07 KR KR1019980007624A patent/KR100299501B1/ko not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2478501A (en) * | 2008-12-18 | 2011-09-07 | Nelson Stud Welding Inc | Turbine wheel and shaft joining processes |
| KR102649846B1 (ko) | 2023-10-06 | 2024-03-21 | 위더맥스(주) | 멀티 칩 패키지 내 칩 간 인터커넥션 결함 검사 장치 및 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19990074197A (ko) | 1999-10-05 |
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