Patent ID: 11923353
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method comprising:
depositing a light to heat conversion (LTHC) layer over a carrier;
forming a first through via and a second through via over the LTHC layer;
attaching a die over the LTHC layer, the die being disposed between the first through via and the second through via;
encapsulating the die, the first through via, and the second through via with a molding compound;
forming a redistribution structure over the die and the molding compound, the redistribution structure being electrically connected to the die, the first through via, and the second through via; and
irradiating the LTHC layer through the carrier, wherein irradiating the LTHC layer removes the carrier and decomposes a first portion of the LTHC layer without decomposing a second portion of the LTHC layer; and
after irradiating the LTHC layer, a surface of the second portion of the LTHC layer comprises convex and concave portions, the surface of the second portion of the LTHC layer being opposite to the die.