US5052816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junction inspection method and apparatus for electronic parts
Assignee: Denyo Co Ltd
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Filing: 1989-08-29
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Granted: 1991-10-01
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Expires: 2009-08-29
Abstract
Abstract A plurality of lead wires such as those from an IC (an integrated circuit) is irradiated by a fan beam at same time. Infrared rays radiated from the portion which is irradiated by the fan beam and the periphery of the portion are detected so as to catch a thermogram exhibiting the temperature distribution. The thermogram is processed by image processing so as to produce a temperature distribution image. This image is visually compared with a standard temperature distribution-pattern on a display apparatus to judge whether soldering on those lead wires is defective or not.
Inventors
- 👤 Minoru Nakamura
- 👤 Yasuhiro Oshiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:55
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/72
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
An apparatus for inspecting soldered junctions of an electronic part having a plurality of terminals to be measured said apparatus comprising: (a) a heating station which includes: generating means for generating a heat energy fan beam directed toward the soldered junctions to be inspected; and irradiating means, having an adjusting means for adjusting the width of the fan beam from said generating means, for irradiating the soldered junctions with the fan beam; (b) a photographing station which includes: detecting means for detecting infrared rays radiated from the soldered junctions after irradiation by the fan beam at said heating station so as to produce a signal representing the condition of the soldered junctions; and image processing means for processing the signal from the detecting means so as to make up data to be used for displaying the condition of the soldered junctions; and (c) transferring means for transferring the electronic part between the heating station and the photographing station.
Claim 2
Independent Claim
158 words
An apparatus for inspecting soldered junctions of an electronic part having a plurality of terminals to be measured said apparatus comprising: (a) a heating station which includes: generating means for generating a heat energy fan beam directed toward the soldered junctions to be inspected; and irradiating means, having an adjusting means for adjusting the width of the fan beam from said generating means, for irradiating the soldered junctions with the fan beam; (b) a photographing station which includes: detecting means for detecting infrared rays radiated from the soldered junctions after irradiation by the fan beam at said heating station so as to produce a signal representing the condition of the soldered junctions; and image processing means for processing the signal from the detecting means so as to make up data to be used for displaying the condition of the soldered junctions; and (c) transferring means for transferring the electronic part between the heating station and the photographing station.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, wherein said adjusting means has means for varying the distance from said adjusting means to the soldered junctions.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1, wherein said adjusting means has means for varying the angle of the fan beam.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |