Patent ID: 11876094
Assignee: NANYA TECHNOLOGY CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The method for fabricating the semiconductor device of claim 1, wherein the first semiconductor unit, the second semiconductor unit, and the third semiconductor unit are formed by a planarization process,
wherein, in the first active region, the third insulating film is turned into a first bottom insulating layer, the second conductive film is turned into a bottom conductive layer, and the filler film in the first trench is turned into a first filler layer, wherein the first bottom insulating layer, the first bottom conductive layer, and the first filler layer together form the first semiconductor unit in the first trench;
wherein, in the second active region, the first insulating film is turned into a second bottom insulating layer, the second insulating film is turned into a second middle insulating layer, the third insulating film is turned into a second top insulating layer, the second conductive film is turned into a second bottom conductive layer, and the filler film in the second trench is turned into a second filler layer, wherein the second bottom insulating layer, the second middle insulating layer, the second top insulating layer, the second bottom conductive layer, and the second filler layer together form the second semiconductor unit in the second trench;
wherein, in the third active region, the second insulating film is turned into a third bottom insulating layer, the third insulating film is turned into a third top insulating layer, the first conductive film is turned into a third bottom conductive layer, the second conductive film is turned into a third top conductive layer, and the filler film in the third trench is turned into a third filler layer, wherein the third bottom insulating layer, the third top insulating layer, the third bottom conductive layer, the third top conductive layer, and the third filler layer together form the third semiconductor unit in the third trench.