Mask for continuously transverse solidifying technology and method for forming polycrystal silicon layer

Abstract

The present invention disclose a mask used in continue transverse direction solidifying technology for generating one crystallizing boundary dispersive polysilicon film. The present invention mask at least contains one first zone, one second zone, and one third zone, wherein first zone and third zone being transparent, second zone being shading, first zone surrounded in second zone and first and second zone having basically same periphery shape, third zone and first zone having same periphery shape, and third zone and first zone and second zone parallel configured in one predetermined direction. Said invention has advantages of utilizing mask pattern complemental concept, designing out at least two crystal grain directional polysilicon pattern, through controlling mask plurality of shading zone and photic zone pattern area size to obtain perfect grain boundary.

Description

technical field [0001] The invention relates to a mask used in polysilicon thin film technology, in particular to a mask for producing a polysilicon thin film with dispersed crystal boundaries by continuous lateral solidification technology, specifically a mask and the formed polysilicon. Background technique [0002] Thin film transistors (Thin Film Transistor; TFT) have been widely used in active liquid crystal displays, and the materials used in the thin film transistors generally include amorphous silicon (amorphous-silicon) and polysilicon (poly-silicon). [0003] In the manufacture of liquid crystal displays, polycrystalline silicon materials have many characteristics superior to amorphous silicon materials. For example, polysilicon has larger grains, and electrons are easy to move freely in polysilicon, so the electron mobility (mobility) of polysilicon is higher than that of amorphous silicon. The response time of polysilicon thin film transistors made of polysilico...

AI Technical Summary

Problems solved by technology

According to the experimental results, the channel of the thin film transistor can have better electrical performance when the channel is parallel to the grain growth direction. On the contrary, if the channel of the transistor is perpendicular to the grain growth direction, its electrical performance is poor.

Therefore, the TFT channels on the panel must be arranged in a single direction, which is very inconvenient for circuit design.

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