Solar cell manufacturing method and manufacturing device

Abstract

With a solar cell manufacturing method, structural defects (A1, A2) present in a compartment element (21) are detected, such that an image (M) is obtained by photographing the region that includes the structural defects (A1, A2) and a scribe line (19). Spacing between mutually adjacent scribe lines (19) or a first number of pixels corresponding to the width of the scribe line (19) is specified. Spacing between mutually adjacent scribe lines (19) which has already been stored or an actual measurement value indicating the width of the scribe line (19) which has already been stored is referenced, and the first number of pixels and the actual measured value are compared to calculate the actual dimension per pixel in the image (M). A second number of pixels corresponding to the distance between the structural defects (A1, A2) and the scribe line (19) is specified, and the second number of pixels and the actual dimension per pixel are compared to calculate defect position information. A laser beam is applied based on the defect position information, and the structural defects (A1, A2) are electrically separated.

Description

technical field [0001] The present invention relates to a method and device for manufacturing a solar cell, and more specifically, to a method and device for manufacturing a solar cell capable of rapidly detecting and repairing structural defects at low cost. [0002] This application claims priority based on Japanese Patent Application No. 2008-209209 for which it applied on August 15, 2008, and uses the content here. Background technique [0003] From the viewpoint of efficient utilization of energy, in recent years, solar cells have been widely and commonly used. In particular, solar cells using silicon single crystals are excellent in energy conversion efficiency per unit area. However, on the other hand, since solar cells using silicon single crystals use silicon wafers obtained by cutting silicon single crystal ingots, the production of ingots requires a lot of energy, resulting in high manufacturing costs. In particular, when realizing a large-area solar cell instal...

AI Technical Summary

Problems solved by technology

[0016] However, in the above-mentioned conventional method of controlling the position of laser irradiation, the distance between the imaging device and the solar cell changes, or the actual size of each pixel in the captured image changes every time the imaging magnification is changed. will change

[0017] Therefore, after recalculating the actual size of each pixel of each solar cell, it is necessary to move the stage to adjust the position of laser irradiation, which is a troublesome defect repairing step.

[0018] In addition, since it is necessary to form a laser mark as a mark on the partition unit of the solar cell every time the actual size of each pixel is calculated, there is also the problem of causing unnecessary damage to the partition unit.

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