Tiny pattern net-joint-free printing screen plate for solar cell positive electrode

Abstract

The invention discloses a tiny pattern net-joint-free printing screen plate for a solar cell positive electrode. The printing screen plate comprises a screen frame and a mesh fixed into the screen frame in a tension connecting manner. Each longitudinal line and each latitude line in the mesh are parallel or perpendicular to the screen frame correspondingly. The mesh is provided with a printing area and a non-printing area. Patterns in the printing area comprise auxiliary grid line holes, main grid line holes and border line holes. The auxiliary grid line holes are located between every two adjacent latitude lines. Each main grid line hole communicates with multiple auxiliary grid line holes. The main grid line holes and the auxiliary grid line holes are arranged perpendicular to each other. Each main grid line hole is provided with multiple tiny patterns which electric conducting silver paste cannot penetrate through. Periphery border line holes are formed around the main grid line holes and the auxiliary grid line holes. The periphery border line holes are in wave shapes or sawtooth shapes. The printing screen plate solves the problems that net joints formed by the longitudinal lines and the latitude lines on screen cloth in the prior art severely influence printing paste, line breaking of printing is caused, and due to shielding of the longitudinal lines and the latitude lines, printing skip of a border and printing skip of a main grid are caused.

Description

technical field [0001] The invention belongs to the technical field of solar cell preparation, and in particular relates to a micro-graphic net-knot printing screen plate for a positive electrode of a solar cell. Background technique [0002] With the increasing tension of global energy sources, solar energy has been widely valued by countries all over the world due to its unique advantages such as no pollution and large market space. Solar cell, also known as "solar chip" or "photovoltaic cell", is a device that uses the photovoltaic effect to directly convert solar energy into electrical energy. It mainly includes crystalline silicon cells, semiconductor cells, inorganic cells, organic cells, etc., among which crystalline silicon solar cells Dominant position in the mainstream of the market. [0003] The structure of crystalline silicon solar cells mainly includes front suede, front p-n junction, front anti-reflection film, front and back electrodes and other parts. Among...

AI Technical Summary

Problems solved by technology

[0005] In view of this, aiming at the deficiencies of the prior art, the present invention provides a micro-graphic grid-free printing screen for the positive electrode of the solar cell to solve the problem that the net knots formed by the warp and weft threads on the mesh cloth in the prior art seriously affect the printing paste. materials, printing disconnection and other bad problems, as well as the problem of border virtual printing and main grid virtual printing caused by the occlusion of latitude and longitude lines

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