JPS6286874A - Manufacture of solar battery - Google Patents

Abstract

PURPOSE:To obtain a solar battery of desired size and shape by covering a glass substrate with a resin protective film to the edge of the surface, and then cutting from the back of the substrate, thereby eliminating a crack at the edge of the resin film. CONSTITUTION:In this case, a resin film 3 is formed to cover a glass plate 2 to its edge 21. Accordingly, when a diamond roller 5 is scribed on the plate 2 on a substrate 4 on the line A-A in a direction of an arrow 6 as shown, even if the roller 5 arrives at the position C near the edge of the plate 2, a resin film 32 exists thereunder so that the roller 5 is scanned on the layer. Thus, each photovoltaic element 1 can be divided without cracking or damaging the plate 2. As a result, a solar battery of desired method and shape can be formed without damage of the edge of the glass plate.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

The present invention involves forming a plurality of regions consisting of a laminate of a transparent conductive film, a semiconductor thin film, and a metal electrode film on a thin glass substrate, covering the entire surface with a resin protective film, and then cutting and dividing the regions. This invention relates to a battery manufacturing method.

[Prior art and its problems]

In order to manufacture a large number of small solar cells, it is necessary to use an insulating substrate made of, for example, soda glass or borosilicate glass.
A plurality of photovoltaic elements consisting of a transparent conductive film, a semiconductor thin film containing amorphous silicon pintL&, and a metal electrode film are formed on a glass substrate with a thickness of 5 m or less, and the entire surface of the substrate is coated with epoxy resin or the like. The protection! After covering with IIII, the substrate surface is cut by scribing with a diamond cutter and divided into each element, thereby obtaining a solar cell whose surface is coated with a resin protective film. FIG. 2 shows the dividing process, and as can be seen from the plan view in FIG. It is covered with. To divide this element 1, place the resin film 3 down on the base 4, and move the diamond roller 5 along the dividing line B-B along the arrow 6.
Scribing in the direction of. However, in this case, when the roller 5 passes the end 31 of the tree II membrane 3,
As shown in the figure, a crack appeared in the glass plate 2, and the glass plate was broken, resulting in a thick IK of the desired size and shape! It often happens that batteries cannot be obtained.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks and provides a method for manufacturing a solar cell that can obtain desired dimensions and shape without cracking the substrate when performing diamond scribing between elements formed on a glass substrate. With the goal.

[Key points of the invention]

According to the present invention, by coating the resin protective film up to the edge of the front surface of the glass substrate and then cutting from the back side of the glass substrate, the occurrence of cracks on the edge of the resin is eliminated, and the above-mentioned purpose is achieved. achieved.

[Embodiments of the invention]

FIG. 1 shows an embodiment of the present invention, and parts common to FIG. 2 are given the same reference numerals. As is clear from FIG. 1 [al, in this case, the resin film 3 is
It is formed to cover up to 1. Therefore, as shown in the first report), the glass plate 2 on the base 4
Roll the diamond roller 5 over the surface of &l! When scribing on A-A in the direction of arrow 6, even when the roller reaches position C near the edge of the glass plate, there is a resin film r2 underneath, and the roller scans all the laminated layers. Each photovoltaic element 1 can be divided without cracking or breaking the glass plate. As a result, a solar cell having the desired size and shape is completed without any chipping at the edge of the glass plate.

【Effect of the invention】

As described above, the present invention involves diamond scribing the glass plate surface to produce a solar cell by dividing a plurality of photovoltaic elements covered with a resin protective film on a thin glass substrate. To prevent cracks from forming on the glass plate when cutting it to size and shape, a resin protective film is applied to the edges of the substrate (this is extremely effective in improving yield during mass production of solar cells). be.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, (4) is a plan view before division, crest) is a sectional view taken along line A-A of [a] showing the diamond scribing process, and Fig. 2 is a conventional method. shows,
lal is a plan view before division, (bl, (C) is a cross-sectional view taken along the line B-B of al, showing the steps of diamond scribing in sequence. l: Photovoltaic element, 2 glass temporary, 21 glass plate &i
m, 3: Resin protective film, 5: Diamond row No. 11 1s2 figure

Claims (1)

[Claims] 1) Form multiple regions consisting of a transparent conductive film, a semiconductor thin film, and a metal electrode film laminate on a thin glass substrate, cover the entire surface with a resin protective film, and then cut the glass substrate from the back side. 1. A method for manufacturing a solar cell, characterized in that when dividing each region, the resin protective film is applied to the edge of the surface of the glass substrate.