The Bergquist Company

Mary L Randall

A touch screen assembly for contact input systems, with the touch screen including a base substrate with an electrically resistive coating thereon. An array of reticulated spaced raised projections are formed on the inner surface, with the raised projections consisting of a developed/cured photoresist. In its formation, the photoresist is applied as an adherent layer with a release-film backing, with the layer being applied onto a heated substrate. Thereafter, a laminate is formed by passing the photoresist layer beneath a heated pneumatically actuated nip roll to cause the photoresist layer to flow, thereby forming a layer of uniform thickness. Thereafter, the laminate is masked, exposed to incident radiation, and developed so as to provide a reticulated pattern of adherent raised projections. A flexible plastic film having a resistive coating thereon is thereafter mounted on the substrate in superimposed relationship to the raised projections.

Touch screen dielectric separators

An improved electrode arrangement for touch screen panels wherein the conductive segments forming the edge arrays and the elongated buses which deliver input signals to the arrays are in stacked superimposed relationship, one to the other. At the respective cross-over points between the buses and the conductive segments, the respective axes are angularly disposed, one to the other, so as to eliminate the creation of an impedance which may adversely affect the accuracy of the output of the touch screen. Each cross-over point is located along a solid portion of the conductive segments comprising the array.

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Buffalo, MN, United States of America

Mary L Randall