Patent ID: 11961762
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method comprising:
forming a device die comprising:
forming a metal pad;
depositing a passivation layer over and contacting the metal pad;
forming a photo-sensitive layer on the passivation layer;
light-exposing and developing the photo-sensitive layer to reveal the passivation layer;
performing a first etching process on the passivation layer;
after the first etching process, performing a second etching process, wherein the first etching process and the second etching process are performed using different process conditions, and wherein the photo-sensitive layer remains until a time after the second etching process is performed;
after the second etching process, forming conductive feature extending into the passivation layer to contact the metal pad; and

bonding a package component to the device die, with a solder region bonding the package component to the conductive feature.