Patent ID: 11908936
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. The method of claim 17, wherein forming the semiconductor channel layer comprises:
forming a first alternating stack of first and second sublayers including a set of first sublayers that each include a combination of a first metal oxide material, MOx, and a second metal oxide material, M′ OX, and a set of second sublayers including zinc oxide;
forming a third sublayer over the first alternating stack, wherein the third sublayer includes a combination of a first metal oxide material, MOx, a second metal oxide material, M′Ox, and zinc oxide; and
forming a second alternating stack of first and second sublayers over the third sublayer including a set of first sublayers that each include a combination of a first metal oxide material, MOx, and a second metal oxide material, M′Ox, and a set of second sublayers including zinc oxide, wherein M is a first metal selected from a group consisting of indium (In) and tin (Sn) and combinations thereof, M′ is a second metal selected from a group consisting of gallium (Ga), hafnium (Hf), zirconium (Zr), titanium (Ti), aluminum (Al), strontium (Sr), barium (Ba), scandium (Sc), magnesium (Mg), lanthanum (La), gadolinium (Gd), and combinations thereof.