Claims
- 1. Apparatus for testing electrical circuits associated with an integrated circuit package connected to electrical leads on a printed circuit board under test, the apparatus comprising:
- a test fixture mounting the printed circuit board in a position for testing, the test fixture including support means for a circuit test device adapted for movement relative to the board under test;
- a test module having a housing that carries the circuit test device, the circuit test device conducting electrical test signals for a functional test of the integrated circuit package;
- a hanger suspending the test module from the support means above the integrated circuit package, the housing including a plurality of spaced apart hanger probes carried by the support, the hanger probes connected to individual compression spring means between the hanger probes and their connections to the module housing, the hanger probes and their corresponding compression springs being independent of the electrical test signals conducted by the circuit test device, said relative movement of the support means and the board under test causing the hanger to position the circuit test device in a testing position aligned for contact with the integrated circuit package or its connections to the leads on the printed circuit board;
- the compression springs providing a means of compliancy between the support means on the fixture and the printed circuit board as the test module is moved into alignment in said testing position; and
- contact means within the fixture for providing electrical test signals passing between the circuit test device on the housing and the electrical leads on the printed circuit board.
- 2. Apparatus according to claim 1 in which the test device comprises an array of electrically conductive pads on the housing, and the contact means comprise spring probes carried by the fixture for contact with the array of pads.
- 3. Apparatus according to claim 2 in which the test device further includes individually compliant contacts on the housing positioned for releasable contact with corresponding terminals on the integrated circuit package that connect to the leads on the printed circuit board.
- 4. Apparatus according to claim 2 in which the test device further includes individually compliant contacts on the housing positioned for releasable contact with corresponding leads on the printed circuit board connected to corresponding terminals on the integrated circuit package.
- 5. Apparatus according to claim 1 in which the module housing positions the electrical test device for contact with the integrated circuit package.
- 6. Apparatus according to claim 5 including means for contacting the leads on the printed circuit board when the integrated circuit package is contacted by the test device for testing.
- 7. Apparatus according to claim 6 in which the housing includes tooling pins for aligning the housing with the printed circuit board in said testing position.
- 8. Apparatus according to claim 1 in which the housing includes tooling pins for aligning the housing with the printed circuit board in said testing position.
CROSS-REFERENCE
This is a division of Ser. No. 998,554, filed Dec. 30, 1992, now U.S. Pat. No. 5,289,117, issued Feb. 22, 1994, which is a division of Ser. No. 757,006, filed Sep. 9, 1991, now U.S. Pat. No. 5,180,976, issued Jan. 10, 1993, which is a division of Ser. No. 698,724, filed May 10, 1991, which is a division of Ser. No. 427,932, filed Oct. 25, 1989, now U.S. Pat. No. 5,049,813, issued Sep. 19, 1991, which is a continuation of Ser. No. 214,365, filed Jul. 1, 1988, abandoned, which is a continuation-in-part of Ser. No. 142,990, filed Jan. 12, 1988, abandoned, which is a continuation-in-part of Ser. No. 091,536, filed Aug. 31, 1987, abandoned, which is a continuation-in-part of Ser. No. 039,876, filed Apr. 17, 1987, abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2061630 |
May 1981 |
GBX |
Non-Patent Literature Citations (1)
Entry |
RIM Electronic Handbook, 1985 (3 pages). |
Divisions (4)
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Number |
Date |
Country |
Parent |
998554 |
Dec 1992 |
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Parent |
757006 |
Sep 1991 |
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Parent |
698724 |
May 1991 |
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Parent |
427932 |
Oct 1989 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
214365 |
Jul 1988 |
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Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
142990 |
Jan 1988 |
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Parent |
91536 |
Aug 1987 |
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Parent |
39876 |
Apr 1987 |
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