초록 ▼

By suitable use of screen-printed carbon ink patterning, combined with patterning of the solder-mask layer on the top (finger) surface, a compact capacitive touchpad pointing device has been realized using only a two-layer board as a substrate. The first layer, on the topside of the printed circuit

By suitable use of screen-printed carbon ink patterning, combined with patterning of the solder-mask layer on the top (finger) surface, a compact capacitive touchpad pointing device has been realized using only a two-layer board as a substrate. The first layer, on the topside of the printed circuit board, combines both the horizontal and vertical sensor electrode traces. The second layer, located on the underside of the printed circuit board, is formed in the conventional manner by attaching the controller chip and/or related circuitry.

대표청구항 ▼

[ What is claimed is:] [1.] A touchpad pointing device comprising:a printed circuit board having a top and under side,a first layer on the top side of the printed circuit board which includes a plurality of metal sense pads,and a first plurality of conductive traces disposed in a first direction con

[ What is claimed is:] [1.] A touchpad pointing device comprising:a printed circuit board having a top and under side,a first layer on the top side of the printed circuit board which includes a plurality of metal sense pads,and a first plurality of conductive traces disposed in a first direction connecting some of said sense pads forming sensor electrodes in said first direction,and a second plurality of conductive traces disposed in a substantially orthogonal direction connecting others of said sense pads forming sensor electrodes in said second direction said first and second plurality of conductive traces are on the same surface of the first layer,and a second layer formed on the underside of the printed circuit board which includes conductors for the interconnection of electrical components associated with the touchpad.