Circuit configuration of a touch panel controller IC

摘要

A circuit configuration for touch panel controller IC includes a substrate including electrode pins arranged along four border edges thereof for signal transmission, and a controller mounted on the substrate and surrounded by the electrode pins and including processing units arranged in one same direction in a parallel manner, electric contacts arranged in three rows at three sides around the processing units and respectively electrically connected to the electrode pins of the substrate by respective lead wires and steering wires respectively electrically connected between the processing units and the electric contacts. Arranging the processing units in one same direction in a parallel manner minimizes differences in environmental conditions in exposure graphic definition and etch rate, thereby obtaining better circuit component process uniformity, and thus, the variation among the processing units after fabrication can be insignificant and better sensing accuracy can be achieved.

主权项

1. A circuit configuration for touch panel controller integrated circuit (“IC”), comprising:
a substrate comprising a plurality of electrode pins arranged along opposing front and rear border edges and opposing left and right border edges thereof for signal transmission, and a plurality of lead wires respectively extended from said electrode pins toward a center part of said substrate; and a controller mounted on said substrate and surrounded by said electrode pins, said controller comprising a plurality of processing units, all of the plurality of processing units being arranged in a single direction in a parallel manner in the form of a rectangular array that defines opposing front and rear sides and opposing left and right sides corresponding to the opposing front and rear border edges and opposing left and right border edges of said substrate, a plurality of electric contacts respectively electrically connected with the respective opposite ends of the lead wires that are respectively connected to the electrode pins at the front, left and right border edges of said substrate, and a plurality of steering lead wires respectively electrically connected between said processing units and said electric contacts, the plurality of electric contacts including first to third parts that are respectively arranged along the front, left and right sides around said processing units, wherein the pitch of the first part of the plurality of electric contacts is larger than pitch of said processing units.