Patent ID: 9287236
Filing Date: 2016-03-15
CPC Classification: H01L

Claim Text:
1. A method assembling a packaged integrated circuit (IC) device, the method comprising: (a) forming a sub-assembly by attaching an IC die comprising a plurality of contact points to a contoured lead frame, the lead frame comprising a base plate and a plurality of raised features; (b) applying a first encapsulant on the top of the sub-assembly of step (a); (c) forming conductive interconnects between the plurality of contact points and corresponding raised features of the plurality of raised features; (d) applying a second encapsulant on top of the sub-assembly of step (c); (e) removing the bottom of the sub-assembly of step (d), including the base plate, to separate the raised features; and (f) applying a third encapsulant on the bottom of the sub-assembly of step (e), wherein the first, second and third encapsulants comprise a low-modulus gel and after curing, the low-modulus gel has a tensile modulus below 100MPa.