Patent ID: 9107303
Filing Date: 2015-08-11
Classification: H01L,H05K

Abstract:
1. An electronic assembly, comprising: multiple electronic devices with primary faces where electrical contacts are located, opposed rear faces, and edges extending between the primary and rear faces; a perforated warp control sheet having a first surface, an opposed second surface, and multiple openings therein sized to accept the multiple electronic devices and having a first coefficient of thermal expansion (CTE), wherein the multiple electronic devices are located in the multiple openings in the perforated warp control sheet so that gaps are located between the edges of the electronic devices and edges of the openings, wherein the primary faces of the electronic devices are substantially co-planar with the first surface of the perforated warp control sheet, and wherein the opposed rear faces of the multiple electronic devices are higher than the second surface of the perforated warp control sheet; and cured plastic encapsulation material in the gaps and over the second surface of the perforated warp control sheet, wherein a characteristic of the plastic encapsulation material is that a second CTE of the plastic encapsulation material is different from the first CTE by 5% or more, so that a panel containing the multiple electronic devices and the perforated warp control sheet has a convex warp, wherein the primary faces are exposed at a first surface of the panel, and the first surface of the panel has a convex curve.