Sensing unit for a position detecting apparatus and its manufacturing method
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United States of America Patent
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Aug 22, 1995
Grant Date -
N/A
app pub date -
Jun 17, 1992
filing date -
Dec 5, 1991
priority date (Note) -
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status (Latency Note)
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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.
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