Sensing unit for a position detecting apparatus and its manufact

Details Sensing unit for a position detecting apparatus and its manufact Sensing unit for a position detecting apparatus and its manufact

1992-06-17

1995-08-22

Chin, Stephen

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

054441900

ABSTRACT:
The present invention provides a sensing unit for a position detecting apparatus permitting freer setting of a reading efficiency and having a thinner appearance and its manufacturing method for realizing simple manufacturing, high yield, and low cost.
According to the present invention, two plies of conductor patterns 22 and 23 are produced on one side 21a of an insulating substrate 21 to form a plurality of sense wires, a shielding plate 28 is adhered to other side of the insulating substrate 21, then the insulating substrate 21 is died together with the shielding plate 28. This obviates through holes for which drilling the insulating substrate is required, and diminishes the difference between the distances of the two plies of conductor patterns 22 and 23 from a position indicator. Furthermore, a spacer for separating conductor patterns from a shield becomes unnecessary.

REFERENCES:
patent: 4678870 (1987-07-01), Taguchi et al.
patent: 5117071 (1992-05-01), Greanias et al.
patent: 5136125 (1992-08-01), Russell
patent: 5218173 (1993-06-01), Garwin et al.

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