Browse Prior Art Database

Test Apparatus for Memory Control Decks

IP.com Disclosure Number: IPCOM000085487D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Hubacher, EM: AUTHOR

Abstract

Two methods are shown for testing memory control decks (MCD). The MCD 1 under test has a multilayer ceramic substrate 2 with integrated circuit chips 3 electrically connected thereto. The methods permit each control deck to be functionally tested prior to assembly, thereby minimizing the cost of repair. Likewise, a standard control deck could be fabricated for functionally testing memory decks.

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Test Apparatus for Memory Control Decks

Two methods are shown for testing memory control decks (MCD). The MCD 1 under test has a multilayer ceramic substrate 2 with integrated circuit chips 3 electrically connected thereto. The methods permit each control deck to be functionally tested prior to assembly, thereby minimizing the cost of repair. Likewise, a standard control deck could be fabricated for functionally testing memory decks.

The MCD 1 has metal input/output pads 4 and brazed pins 5 thereon. The first is shown in Fig. 1. The test deck 6 would have buckling beam or cantilever probes 7 (approx. 700) on the bottom side. These probes 7 would mate by a mechanical Z motion press to the pads 4 on the top surface of the MCD 1. A holding frame 8 around the test deck 6 would provide for lowering and alignment. Electrical wiring 9 is schematically shown coming from the MCD socket to the tester.

Fig. 2 shows the second test apparatus where like numbers indicate similar elements to Fig. 1 structure. The buckling beam probes 6 are used with a holding fixture 11 to permit raising/lowering and alignment of the two decks. Circuitry in the form of integrated circuit chips 12 are placed on the ring fixture
11. Diagnostic probing of the deck is possible in this embodiment, since the center area of the MCD 1 is now exposed and free for probing from above.

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