Semiconductor Packaging Ring for Warpage Control
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Solution Overview
Problem
Semiconductor devices face challenges in warpage control during packaging, which affects mechanical strain, reliability, and integration density, especially as components become smaller and more densely packed.
Innovation Solution
A ring and molding material are used around an integrated circuit die on a substrate to provide warpage control, with the ring offering mechanical support and the molding material encapsulating the die, reducing stress and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If integration density is increased by reducing component size, then more components can be integrated into a given area, but warpage control becomes more difficult and mechanical strain increases
Solution Approach 1:
The patent divides the packaging structure into distinct functional segments: a rigid support ring, encapsulant material, and die attach structure. This segmentation allows each component to address specific mechanical challenges independently, with the ring providing warpage control and the encapsulant providing stress distribution, thereby maintaining reliability in high-density packages
Solution Approach 2:
The patent employs composite material structures combining rigid ring materials (such as metal or ceramic) with flexible encapsulant materials (such as epoxy or polymer). This composite approach creates a structure that simultaneously provides mechanical support for warpage control and stress distribution, resolving the contradiction between high integration density and warpage control
2Area of stationary object
If component size is reduced to increase integration density, then package area is reduced, but mechanical stability and warpage control deteriorate
Solution Approach 1:
The patent applies local quality enhancement by placing a rigid ring structure specifically at the perimeter and critical stress zones of the package, while the central area contains the die and interconnect structures. This localized reinforcement provides mechanical stability and warpage control without increasing overall package area, as the rigid ring is positioned only where structurally necessary
3Reliability
If encapsulant material is applied to protect the die, then reliability improves, but additional stress and warpage may be induced
Solution Approach 1:
The patent applies preliminary anti-action by first establishing the rigid ring structure to define the package geometry and provide mechanical support, then applying the encapsulant material within the constraints of this pre-formed structure. The ring prevents the encapsulant from inducing excessive warpage by maintaining structural integrity during and after encapsulant curing, thereby counteracting the potential harmful stress before it can cause damage
Data Source
AI summary
Packaging methods for semiconductor devices, and packaged semiconductor devices are disclosed. In some embodiments, a method of packaging a semiconductor device includes coupling a ring to a substrate, and coupling an integrated circuit die to the substrate within the ring. A molding material is disposed around the integrated circuit die within the ring.