BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described according to the appended drawings in which:
FIG. 1 is a schematic diagram of a conventional touch-control monitor;
FIG. 2 is a cross-sectional diagram of the touch panel in FIG. 1;
FIGS. 3(
a)-3(c) are diagrams regarding the manufacturing steps of a light transmission touch panel in accordance with a first embodiment of the present invention;
FIG. 4 is a cross-sectional diagram along line 1-1 in FIG. 3(c);
FIGS. 5(
a)-5(c) are diagrams regarding the manufacturing steps of a light transmission touch panel in accordance with a second embodiment of the present invention; and
FIG. 6 is a cross-sectional diagram along line 2-2 in FIG. 5(c).
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 3(
a)-3(c) are diagrams regarding the manufacturing steps of a light transmission touch panel 30 in accordance with the present invention. A first transparent conductive layer 32 is patterned and formed on a transparent substrate 31 by a photolithography process, and includes a plurality of first electrode plates 321 and a plurality of first wires 322 longitudinally connecting first electrode plates 321 that are aligned. The transparent substrate 31 is glass or a transparent polymer such as polycarbonate (PC) and polyvinyl chloride (PVC). Furthermore, the first transparent conductive layer 32 is an indium-tin oxide (ITO), aluminum-zinc oxide (AZO) or indium-zinc oxide (IZO). The photolithography process includes sputter, coating, exposure, soft baking, hard baking, development, baking and so on.
As shown in FIG. 3(b), an insulation layer 33 is overlaid on the first transparent conductive layer 32 and the substrate 31, and is a polymer material such as epoxy, polyimide or acrylic. As shown in 3(c), a patterned second transparent conductive layer 34 is overlaid on the insulation layer 33, and comprises a plurality of second electrode plates 341 and a plurality of second wires 342 transversely connecting the second electrode plates 341 that are aligned. Furthermore, there are a plurality of connection wires 343 disposed on a side of the insulation layer 33, whereby each chain of the second electrode plates 34 transversely connected turns toward the bus end of the first leads 322. The shapes of the first electrode plates 342 and second electrode plates 341 are not limited to be a rhombus or a rectangle. Other kinds of shapes may be devised by persons skilled in the art without departing from the concept of the present invention.
FIG. 4 is a cross-sectional diagram along line 1-1 in FIG. 3(c). The first transparent conductive layer 32, the insulation layer 33 and the second transparent conductive layer 34 are overlaid on the transparent substrate 31 by the photolithography process to form the light transmission touch panel 30, and the insulation layer 33 is sandwiched between the first transparent conductive layer 32 and the second transparent conductive layer 34. A lateral electrical field occurs between one of the first electrode plates 342 and one of the second electrode plates 341 adjacent to each other, once they are electrically charged. Consequently, a component of the electrical field is parallel to the surface of the transparent substrate 31. When an article touches the touch panel 30, the intensity of the electrical lines is accordingly changed so that the touch panel 30 can detect where the touch position is.
FIGS. 5(
a)-5(c) are diagrams regarding the manufacturing steps of a light transmission touch panel in accordance with a second embodiment of the present invention. A first transparent conductive layer 51 and a second transparent conductive layer 52 are patterned and formed on a transparent substrate 51 by a photolithography process, and include a plurality of first electrode plates 521 and a plurality of first wires 522 longitudinally connecting first electrode plates 521 that are aligned. The transparent substrate 31 is glass or a transparent polymer such as polycarbonate (PC) and polyvinyl chloride (PVC). Furthermore, the first transparent conductive layer 32 is an indium-tin oxide (ITO), aluminum-zinc oxide (AZO) or indium-zinc oxide (IZO).
As shown in FIG. 5(b), an insulation layer 53 is overlaid on the first transparent conductive layer 52 and the substrate 51, and is a polymer material such as epoxy, polyimide or acrylic. There are a plurality of through holes 541 provided on the insulation layer 54 and above the electrodes of the second transparent conductive layer 53. As shown in FIG. 5(c), a transparent vertical conductive cylinder 55 is filled in the through hole 541 and has a first end connected to an electrode plate of the second transparent conductive layer 53 so that the electrode plates aligned in a transverse line are electrically dependent. Furthermore, there are a plurality of connection wires 561 disposed on a side of the insulation layer 54, whereby each chain of the electrode plates transversely connected turns toward the bus end of the first wires 522. The shapes of the first electrode plates 541 and the electrode plates of the second transparent conductive layer 53 are not limited to be a rhombus or a rectangle. Other kinds of shapes may be devised by persons skilled in the art without departing from the concept of the present invention.
FIG. 6 is a cross-sectional diagram along line 2-2 in FIG. 5(c). The first transparent conductive layer 52, the second transparent conductive layer 53 and the insulation layer 54 are overlaid on the transparent substrate 51 by the photolithography process to form the light transmission touch panel 50, and the insulation layer 54 is sandwiched between the first transparent conductive layer 52 and the second transparent conductive layer 53. A lateral electrical field occurs between one of the first electrode plates 542 and one of the second electrode plates 541 adjacent to each other once they are electrically charged. Consequently, a component of the electrical field is parallel to the surface of the transparent substrate 51. When an article touches the touch panel 50, the intensity of the electrical lines is accordingly changed so that the touch panel 50 can detect where the touch position is.
The above-described embodiments of the present invention are intended to be illustrative only. Numerous alternative embodiments may be devised by persons skilled in the art without departing from the scope of the following claims.
Patent Application
20070242054
