Browse Prior Art Database

Close Spaced Laser Array

IP.com Disclosure Number: IPCOM000093404D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Craig, RM: AUTHOR [+2]

Abstract

This laser array assembly, drawing B, consists of two similar laminated contactor assemblies 10, the laser array 12, spacers 14, and clamping screws 16. Assembly 10 consists of copper strips 18 and plastic insulating film 20 bonded together and mounted in a copper block 28 for heat sinking. Copper laminate 22 is bonded together only within copper block 28. Strips 18 extend to form mounting surfaces for laser array 12 and fan out in the opposite direction to form electrical connections for energizing the lasers.

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Close Spaced Laser Array

This laser array assembly, drawing B, consists of two similar laminated contactor assemblies 10, the laser array 12, spacers 14, and clamping screws
16. Assembly 10 consists of copper strips 18 and plastic insulating film 20 bonded together and mounted in a copper block 28 for heat sinking. Copper laminate 22 is bonded together only within copper block 28. Strips 18 extend to form mounting surfaces for laser array 12 and fan out in the opposite direction to form electrical connections for energizing the lasers.

Fabrication of laser array 12 requires that the space between strips 18 which form the pedestal for array 12 be free of material obstruction. A special fabricating technique is used. Alternating strips of 5 mil high-conductivity copper and 2 mil plastic film are bonded together with epoxy. To provide the open slot in the region of array 12 and to enable fanning out of the other end of strips 18, a material capable of being dissolved without the solvent affecting conductor 18, insulator 20 or bonding agent is used. This material replaces the insulator where the open slots are desired. Aluminum foil with hydrochloric acid as a solvent is used. The aluminum filler, before removal, enables the contactor to be machined to its final configuration and flattened to make good thermal and electrical contact with the cleaved bars. The finished copper laminate 22 is mounted in block 28 by epoxy 30. The mating surfaces of assembly 10 are then carefully flattened by machine shop techniques. Location pins 34 and holes 32 are used to assure alignment of the opposing surfaces of assembly 10. Spacers 14 are used to assure parallelism of the opposing surfaces. Spacers 14 are of a material with roughly the same coefficient of thermal expansion as the array 12 material. The thickness of spacers 14 is carefu...