Method of manufacturing an electrical component, e.g. a digital

Details Method of manufacturing an electrical component, e.g. a digital Method of manufacturing an electrical component, e.g. a digital

1989-03-29

1991-04-16

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29613, 29620, 29621, 29829, 29842, H01H 1100

Patent

active

050071599

ABSTRACT:
A rotary digital contacting encoder (FIG. 1) including a base (5), comprising--a base epoxy disk (501) with three external, pre-molded in place, connector pins (P.sub.1 -P.sub.3) on its exterior side extending through it, and a conductive layer in the form of two concentric layer rings (502 & 503; FIG. 4); and--an encoder element made of a "Kapton" insulating substrate (510) carrying two, like concentric cog rings (511A & 511B; FIGS. 3 & 7) on its top side. Conductive vias (512 & 513) electrically interconnect each respective cog ring with its respective conductive layer ring and its respective external connector pin, the vias forming conductive paths through the insulating substrate between the conductive layer and the cog rings. The presence of the conductive layer 502/503, which can be screen printed on the base disk, greatly simplifies the relative alignment of the encoder element, conductor pads and terminals. Using the conductive layer the encoder element can be positioned at almost any angular location, while still obtaining proper electrical contact with the terminal pins.

REFERENCES:
patent: 3340491 (1967-09-01), Deakin
patent: 3492623 (1970-01-01), Yamada
patent: 4443670 (1984-04-01), Nakamura et al.

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