Patent ID: 11961852
Assignee: HKC CORPORATION LIMITED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An array substrate, manufactured by a method comprising:
sequentially forming a gate, a gate insulating layer, an active layer, an ohmic contact layer and a metal layer on a substrate, forming a photoetching mask on a metal layer, wherein a thickness of the photoetching mask in a half exposure area of the mask plate is from 2000 Å to 6000 Å;
etching the metal layer, the ohmic contact layer and the active layer outside a covering area of the photoetching mask;
ashing the photoetching mask for a preset time with an ashing reactant, wherein the ashing reactant comprises oxygen and sulfur hexafluoride, the preset time is from 70 seconds to 100 seconds, and a gas volume ratio between a first preset amount of sulfur hexafluoride and a second preset amount of oxygen is from 1:1 to 3:1; and
sequentially etching the metal layer, the ohmic contact layer and the active layer based on the ashed photoetching mask, and forming a channel region of the array substrate.