Universal burn-in fixture

Details Universal burn-in fixture Universal burn-in fixture

1974-03-22

1976-02-17

Scott, James R.

Electrical resistors

Incased, embedded, or housed

Element in insulation with outer metallic sheath

317101C, 338308, 174 685, H02B 104, H01C 100, H05K 116

Patent

active

039393810

ABSTRACT:
A universal burn-in fixture including a printed circuit board having a plurality of regularly spaced areas and with each area receiving a semiconductor socket and with the socket having lead members for connection to the board through a plurality of holes and with the majority of the holes surrounded by a conductive pad area which form islands and with each pad surrounded by an insulating area and with the remaining portion of the printed circuit board forming a conductive land area and with substantially the entire printed circuit board covered by a resistive coating to produce resistances between each pad and the surrounding land, to provide for desired resistances between a socket lead and the land area. A voltage is coupled to the land area to supply the desired burn-in voltage at the socket leads.

REFERENCES:
patent: 3344387 (1967-09-01), Kinkel et al.
patent: 3474304 (1969-10-01), Currin et al.
patent: 3487268 (1969-12-01), Ljungdell et al.
patent: 3601745 (1971-08-01), Helgeland
patent: 3605061 (1971-09-01), Martin
patent: 3648364 (1972-03-01), Endo
patent: 3784951 (1974-01-01), Steidel
patent: 3832602 (1974-08-01), Engelhard et al.

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