Metal working – Method of mechanical manufacture – Electrical device making
Patent
1975-11-07
1977-03-22
Tupman, W.
Metal working
Method of mechanical manufacture
Electrical device making
29589, 29626, 357 30, B01J 1700
Patent
active
040128334
ABSTRACT:
A method is disclosed for making a light emitting diode having positive and negative electrodes which includes forming a first conductive metal layer on a substrate of insulating material, a second conductive layer of a metal different from the first is then formed on the exposed surface of the first layer. The two layers are then etched to form aligned narrow openings and thereafter the first layer is overetched in its opening with the second opening being used as a mask to form a relatively large opening aligned with the narrow opening of the second layer. This leaves the first opening with a pair of eaves overhanging the relatively large opening of the first opening. The dimensions of the large opening are wider than the spacing between the positive and negative electrodes of the light emitting diode. A light emitting diode is then inserted in said aligned openings with its pn junction perpendicular to said substrate, the dimensions of the small opening being such that the eaves are bent down into electrical contact with the positive and negative electrodes of the diode.
REFERENCES:
patent: 3049647 (1962-08-01), Lincoln
patent: 3098951 (1963-07-01), Ayer
Sony Corporation
Tupman W.
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