Browse Prior Art Database

Electro Optical Device Aligner

IP.com Disclosure Number: IPCOM000076476D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Hudick, MG: AUTHOR

Abstract

This aligning device employs the characteristics of light emitting or sensitive devices in assembling an array useful in displays or character reading. The aligner permits electro-optical devices to be disposed within k.0005 inches of display or reading points in the array.

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Electro Optical Device Aligner

This aligning device employs the characteristics of light emitting or sensitive devices in assembling an array useful in displays or character reading. The aligner permits electro-optical devices to be disposed within k.0005 inches of display or reading points in the array.

A plurality of electro-optical devices on array 1, are included in a carrier, typically, a semiconductor substrate. The array is transported through a channel 2 by appropriate mechanical or other means, not shown. When the array engages a plunger 5, it is in the "ready position" for alignment. The plunger 5 retracts to its left-most position and, in so doing, clears the sidewall of the array in the ready position. The transport means moves the array into the channel 6 where it is in the "load position" for alignment. Plunger 5 moves to the right, making contact with the array which travels to the right along the channel until it engages wall 10 of channel 6. In passing along channel 6, the array engages spring 8 which holds it against wall 9 of channel 6. This array is in the "align position" when held against wall 9 by spring 8 and against wall 10 by the plunger
5.

In the align position, electrical contact is made with the bottom of the array by a suitable contact, not shown. Separate electrical contacts are made to the end devices 11 and 12 by probes 13 and 14, respectively. Although other devices may be contacted, the devices 11 and 12 are selected since they provide the longest moment arm for the probes 13 and 14, respectively. An electrical potential is supplied between the bottom contact and probes 13 and 14, to induce a current flow across the junction...