Aluminum alloy plate and producing method thereof

Abstract

The invention provides a an aluminum alloy plate which has good insulating properties, good voltage resistance and good high temperature resistance and a producing method of the aluminum alloy plate. The aluminum alloy plate of a substrate with insulating properties comprises 0.6-3.0 mass% of copper and other elements which contains less than 0.1 mass% of unavoidable impurities except aluminum and copper.

Description

technical field [0001] The present invention relates to an aluminum alloy plate and a manufacturing method thereof. The aluminum alloy plate is preferably used as a thin-film solar cell substrate or a printed circuit board, and has excellent high-temperature strength and withstand voltage characteristics. Background technique [0002] Solar cells are broadly classified into three types: (1) monocrystalline Si solar cells, (2) polycrystalline Si solar cells, and (3) thin-film solar cells. Compared with monocrystalline Si solar cells and polycrystalline Si solar cells that use Si wafers as substrates, thin-film solar cells use various substrates such as glass substrates, metal substrates, and resin substrates, and form thin-film light-absorbing layers on these substrates. [0003] As the light absorbing layer, Si-based thin films of amorphous Si or nanocrystalline Si, compound-based thin films such as CdS / CdTe, CIS (Cu-In-Se), and CIGS (Cu-In-Ga-Se) are used. In addition, by ...

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Problems solved by technology

However, there are disadvantages in that the glass substrate is easily broken, requires sufficient care in handling, and has insufficient flexibility

In addition, in Patent Document 3, one of the important points of the metal strip used as the base is that the coefficient of thermal expansion (TEC) is low in order to prevent peeling or cracking of the deposited metal oxide layer.

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