Method of making a transparent touch screen switch assembly
First Claim
1. A method for making a touch-sensitive switch assembly comprising:
- forming a plurality of conductive row strips on a side surface of an insulating substrate, with each pair of adjacent row strips being separated by a longitudinally extending row channel, respectively;
forming a plurality of conductive column strips on a side surface of an insulating substrate, with each pair of adjacent column strips being separated by a longitudinally extending column, respectively;
filling each row channel with an insulating deposit until the deposit is enlarged slightly out of the channel, thereby forming a row spacer strip;
filling each column channel with an insulating deposit until the deposit is enlarged slightly out of the channel, thereby forming a column spacer strip; and
,mounting the first insulating substrate onto the second insulating substrate with the row conductors extending transversely with respect to the column conductors and with the row spacer strips engaging the column spacer strips, thereby defining an air gap between the row conductors and the column conductors;
1 Assignment
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Accused Products
Abstract
A touch-sensitive matrix switch assembly includes a pair of transparent insulating substrates having conductive row strips and column strips. The conductive row strips and column strips are separated by longitudinal extending channels, and an insulating spacer strip is deposited in each row channel and in each column channel. The substrates are mounted together with the row conductors extending transversely with respect to the column conductors. An air gap between the row conductors and column conductors is provided by the engagement of the row spacer strips against the column spacer strips. The space strips are formed by very small diameter transparent glass or polymer particles which are mixed with a transparent polymer adhesive in a volatile solvent. The glass or polymer particle/adhesive mixture is sprayed into the channels through a mask to produce a transparent, non-conductive glass or polymer deposit which is enlarged slightly out of the channel, thereby defining a spacer strip. In an analog touch switch assembly, spacer dots are applied onto the surface of a resistive sheet by pneumatically sputtering small diameter transparent glass or polymer particles which are coated by a transparent polymer adhesive.
163 Citations
3 Claims
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1. A method for making a touch-sensitive switch assembly comprising:
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forming a plurality of conductive row strips on a side surface of an insulating substrate, with each pair of adjacent row strips being separated by a longitudinally extending row channel, respectively; forming a plurality of conductive column strips on a side surface of an insulating substrate, with each pair of adjacent column strips being separated by a longitudinally extending column, respectively; filling each row channel with an insulating deposit until the deposit is enlarged slightly out of the channel, thereby forming a row spacer strip; filling each column channel with an insulating deposit until the deposit is enlarged slightly out of the channel, thereby forming a column spacer strip; and
,mounting the first insulating substrate onto the second insulating substrate with the row conductors extending transversely with respect to the column conductors and with the row spacer strips engaging the column spacer strips, thereby defining an air gap between the row conductors and the column conductors; - View Dependent Claims (2, 3)
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Specification