Patent ID: 11955383
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A semiconductor device, comprising:
a substrate having a first surface and a second surface;
a first medium layer located on a first surface of the substrate; and
a groove formed in the first medium layer and penetrating the substrate, wherein a metal layer is formed in the groove, the metal layer includes a first metal layer and a second metal layer formed on the first metal layer, the first metal layer fills the first end of the groove close to the first medium layer, the first metal layer has a first height, the second metal layer has a second height, and the first height is greater than the second height;
a second medium layer formed on the second surface, wherein the second medium layer has an opening exposing the groove, the second metal layer is simultaneously formed on the second medium layer and in the opening;
wherein the groove further comprises an air gap structure formed between the groove and the metal layer, the air gap structure is formed through rapidly depositing a third medium layer on the first surface of the base.