JPH04100140A - Tablets and their manufacturing methods - Google Patents

Abstract

PURPOSE:To obtain accurate position information by coating a non-detection part, which is not used for detection, of a resistance layer with an insulating layer and forming electrodes across edge parts of boundaries between the insulating layer and the resistance layer. CONSTITUTION:A resistance layer 9 is formed on an insulating substrate 8, and an undercoat 18 is printed for insulation on a part other than an approximately central part, which is used for position detection, of the resistance layer 9 so that only this approximately central part is exposed. A silver paste electrode 10 is formed across the resistance layer 9 and the undercoat 18 in boundary parts of the undercoat 18 in both side edges of the exposed resistance layer 9 by printing, and a wiring 11 for leading-out to the external and an external connection part 17 are simultaneously formed by printing. Thus, correct position information is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a tablet (resistance pressure sensitive type) for obtaining positional information of a pressed point, and a method for forming electrodes of this tablet.

"Prior Art" Generally, as shown in FIGS. 3 and 4, a tablet includes an X-axis resistance plate (2) having electrodes (1) (1) at both ends in the X-axis direction, and a and the X-axis resistance plate (4) with electrodes (3) (3) facing each other.

The dot spacers (5), which are small insulating protrusions, are provided on one resistor plate (4) at predetermined intervals, and are arranged with a slight gap between them.

To obtain the position information of the X-axis resistance plate (2), first set the changeover switch (6) to the X contacts (X, ) (X2) (X3).
switch to the side and press the predetermined point (P) with the pen (7) to short-circuit the surface resistance plates (2) and (4). The voltage divided at that point CP) is transmitted from the y side of the X-axis resistance plate (4) through the contact point (X, ) to
It is measured with a voltmeter (V) and output as shaft position information.

Next, while pressing point (P) with the pen (7), switch the changeover switch (6) to the Y contact (Y,) (Y,) (Y3) side, and the divided voltage on the Y axis will also be applied. is from the x2 side of the X-axis resistance plate (2) through the contact (Y, )
It is measured with a voltmeter (V) and output as shaft position information.

Note that since the voltmeter (V) has a high resistance, the resistance values of x2 and y2 have almost no effect on the measured value.

The tablets described above have conventionally been manufactured by a method as shown in FIG.

(a) A resistive layer (9) of a constant thickness is formed by vapor deposition on a substrate (8) such as a polyester sheet.

(b) Resistance layer (9) shaped into a predetermined shape by mask etching
leave only

(c) Electrodes (10) (10) and wiring (11) at both ends of the resistance layer (9) are formed by printing.

(d) A dot spacer (12) is insulated printed on the resistance layer (9) between the electrodes (10) (10), and an external connection part (17) between this resistance layer (9) and the wiring (11) is printed. An insulating overcoat (13) is printed on the parts except for.

(e) The whole is cut into a predetermined shape so that the external connection portion (17) remains slightly protruding upward, and unnecessary portions on the outer periphery are removed to obtain an X-axis resistance plate (14).

The thing formed as above is the X-axis resistance plate (14)
Assuming that, the X-axis resistance plate (15) is (a) (b)
The steps are (c'), (d'), and (e'). Here, the difference between this X-axis resistance plate (15) and the X-axis resistance plate (14) is that the position of the Y-axis electrode (16) (16) (7) is the position of the Y-axis electrode (10) (10). Orthogonal and wiring (11
) and the external connection part (17) are different from each other, and the dot spacer (12) is not provided, but otherwise the structure is the same as described above.

(f) When the X-axis resistance plate (14) and the X-axis resistance plate (15) are overlapped so as to face each other, a tablet is obtained.

"Problem to be Solved by the Invention" Among the above steps, the most problematic is the above (b).
) This is a mask etching process. This step (b) involves covering only the necessary areas with a mask, immersing it in an etching solution, removing unnecessary portions of the resistance layer, and then removing the mask.This step (b) alone takes half of the entire process. There was a problem in that the workability was extremely poor because the Also,
Since the resistive layer is masked in the mask etching process, the resistive layer is affected when the mask is removed, resulting in non-uniform resistance values and a problem in that correct positional information cannot be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device and a method for manufacturing the same that can provide accurate information using a simple method that replaces mask etching.

"Means for Solving the Problems" The present invention provides an X-axis resistance plate in which X-axis electrodes are formed on both ends of a resistance layer on an insulating substrate, and an In a tablet formed by polymerizing a resistive plate with a slight insulation gap, the resistive layer covers the non-detection portion that is not used for detection with an insulating layer, and extends over the edge of the boundary between the insulating layer and the resistive layer. The electrode is formed by forming the electrode.

"Operation" A resistive layer is formed with a constant thickness on an insulating substrate, and the non-detection portions of the resistive layer that are not used for position detection are coated with an undercoat insulating layer to form the X-axis side and the Y-axis side. This Mm
An X-axis electrode and a Y-axis electrode are respectively formed so as to straddle both edges of the boundary between the layer and the exposed resistance layer, and wiring for leading to the outside is provided on the insulating layer. On either side, for example, dot spacer IM! on the exposed resistance layer for the Y axis! ! Edge printing is performed, and an insulating overcoat is printed on areas other than the first position detection part and external connection parts. The whole is cut to exact dimensions so that the external connection part remains slightly protruding, and unnecessary parts on the outer periphery are removed to form the X-axis resistance plate.

Regarding the X-axis resistance plate, the X-axis electrode is formed at a position perpendicular to the Y-axis electrode, and the dot spacer insulation is not printed on the atomized resistance layer on the X-axis side. It is almost the same as a board.

The X-axis resistance plate and the X-axis resistance plate thus formed are faced to each other and overlapped to form a tablet.

"Example" An embodiment of the present invention will be described below with reference to FIG.

The X-axis resistance plate (14) undergoes the following steps (a) (b) (c
) (d) Created by (e).

Step (a): Insulating substrate (8) such as polyester sheet
A resistive layer (9) having a uniform and constant thickness of about 10 .mu.m is formed thereon by vapor deposition or the like.

Step (b): Of the resistive layer (9), the other parts are undercoated (18
) insulation printing.

Step (c): On both sides of the exposed resistance layer (9) and at the boundary with the undercoat (18), so as to straddle the resistance layer (9) and the undercoat (18). The silver paste electrode (10) (10) is formed by printing, and the wiring (11) and the external connection part (17) for leading to the outside are simultaneously formed by printing. Step (d): Resistance layer ( 9) Small dot spacers (12) are formed at predetermined intervals by insulating printing on the spray part used for position detection. Except for the part used for position detection and the external connection part (17) of the wiring (11), the other electrodes (1o) (10) and the wiring (11)
) is formed with an overcoat (19) by insulating printing.

Step (e): The whole is cut into a predetermined shape so that the external connection portion (17) remains slightly protruding upward, and unnecessary portions on the outer periphery are removed to obtain an X-axis resistance plate (14).

Next, the X-axis resistance plate (15) undergoes the following steps (a) (b
) (c') (d') (e').

Steps (a) and (b) are the same as above.

Step (c'): The position of the X-axis electrode (16) (16) is perpendicular to the Y-axis electrode (10) (10), and the external connection part (17) is located at a position where it does not overlap with the wiring (11) on the Y-axis side. Print and form it so that it becomes.

Step (d'): The exposed surface of the resistive layer (9) used for position detection and the surface excluding the external connection portion (17) of the wiring (11) are coated with insulating printing of an overcoat (19). A dot spacer (12) is placed on the exposed surface of the resistance layer (9).
) are not printed.

Step (e'): The whole is cut into a predetermined shape so that the external connection part (17) remains slightly protruding upward, and unnecessary parts on the outer periphery are removed to obtain an X-axis resistance plate (15).

Step (f): The X-axis resistance plate (15) obtained in step (e') is superposed on the X-axis resistance plate (14) obtained in step (e) to form a tablet.

"Effects of the Invention" As described above, the present invention eliminates the mask etching step and is constructed entirely by printing, so that the work time is shortened and it can be provided at low cost. Furthermore, since there is no need to apply or remove an etching mask from the resistive layer, the resistive layer does not deteriorate and accurate positional information can be obtained.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process diagram of a tablet according to the present invention. FIG. 2 is a conventional manufacturing process diagram, FIG. 3 is an explanatory diagram of the operation of the tablet, and FIG. 4 is a sectional view of the tablet. (8)...Substrate, (9)...Resistance layer, (10)...
・Electrode, (11)... Wiring, ' (12)... Dot spacer, (14)... X-axis resistance plate, (15)...
・・X-axis resistance plate, (16) ・・X-axis electrode, (17)・
・・External connection part, (18) ・・Undercoat, (1
9)...Overcoat. Applicant: Niss MK Co., Ltd.

Claims (2)

[Claims] (1) An X-axis resistance plate with X-axis electrodes formed on both ends of a resistance layer on an insulating substrate and a Y-axis resistance plate with Y-axis electrodes formed on both ends of a resistance layer on an insulated substrate with a slight insulation gap. In the tablet formed by polymerization, the resistive layer is formed by covering a non-detection portion that is not used for detection with an insulating layer, and forming the electrodes across the edges of the boundary between the insulating layer and the resistive layer. A tablet with special features. (2) An X-axis resistance plate with X-axis electrodes formed on both ends of a resistance layer on an insulating substrate and a Y-axis resistance plate with Y-axis electrodes formed on both ends of a resistance layer on an insulated substrate with a slight insulation gap. In the polymerized tablet, a step of printing an insulating undercoat on the non-detection portion of the resistance layer that is not used for detection, forming an electrode on the undercoat and the exposed resistance layer, and forming wiring. and a step of printing an insulating overcoat on these electrodes and wiring.