Optical array with improved contact structure

Details Optical array with improved contact structure Optical array with improved contact structure

H - Electricity

05

B

H05B 33/06 (2006.01) B41J 2/45 (2006.01) H01L 33/00 (2006.01)

Patent

CA 2352986

A high density array of light emitting diodes for visual display and imaging purposes. The array is mounted on a thermally and electrically conducting medium such as an aluminum block. The block, in one embodiment, is configured to permit a supplementary cooling liquid to be circulated through it. Typically, such LED arrays are fabricated by forming a plurality of p-type islands in n-type host semiconductor material. Each p-type island has an individually addressable contact and a common n-type contact is made to the aluminum block by, for example an electrically conductive epoxy. In operation the connection between the carrier and array may be lost due to a temperature differential between the two components. The present invention avoids this problem by providing a separate connection in parallel with or in place of the common n-type contact.

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