Electroluminescent lamp contacts and method of making of same
AssigneeTimex Corporation
InventorsHarold Thorgersen, Lyman Daigle
Life of this patent
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Abstract
The method of providing a pair of contact terminals on the back side of an electroluminescent (EL) lamp, of the type which has EL material between front and back conductive layers, which are disposed on a transparent substrate. A bump of conductive material deposited on the front conductive layer is insulated from the back conductive layer for providing a contact terminal on the back of the EL lamp which is connected to the front conductive layer. A preferred embodiment includes the further steps of adding an extension which relocates the back connection to a different place on the back of the EL lamp.
Claims5
A process for providing a pair of electrical contact areas on one side of an electroluminescent lamp, comprising the steps of:
- providing a transparent substrate having a first conductive layer thereon,
- depositing a bump of conductive material on said first conductive layer,
- depositing an electroluminescent insulating layer on said first conductive layer, including an isolating portion surrounding said bump,
- depositing a second conductive layer on said electroluminescent layer in noncontacting relationship with said bump, and
- providing said bump with an exposed conductive surface for making electrical contact thereto on the side of said electroluminescent lamp opposite that of the substrate, and
- depositing a pair of electrical contact areas on said lamp, one of which is electrically connected to said bump.
Dependencies are inferred from the claim text.