Patent ID: 11908776
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of semiconductor die attachment, comprising:
providing at least one metal substrate including a top cavity portion that is sized with area dimensions to receive a semiconductor die having a top side with bond pads thereon and a back side with a metal (BSM) layer thereon;
forming a through-hole aperture including a multi-size cavity by removing metal from an area portion of the top cavity portion and from a bottom cavity portion to form a first ring around the bottom cavity portion;
inserting the semiconductor die top side up to place the BSM layer on the first ring, and
immersing at least the BSM layer of the semiconductor die and a bottom side of the metal substrate into a plating container that provides an electroplating bath including an electroplating solution to plate a metal die attach layer that directly contacts at least a portion of the BSM layer, sidewalls of the bottom cavity portion, and a bottom side of the metal substrate.