Integrated Mold Compound for Chip Assembly
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Solution Overview
Problem
Traditional semiconductor chip manufacturing methods are insufficient for improving speed and efficiency, as they involve complex and stressful processes with multiple materials and steps, leading to potential strength and cost issues.
Innovation Solution
A method of assembling at least two chips on a layer or interposer and applying mold compound around interconnects, leaving the top exposed, which also serves as underfill, reducing the need for separate underfill materials and grinding steps, and enhancing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional semiconductor chip manufacturing methods are used, then chips can be manufactured with existing processes, but the manufacturing process is complex and stressful with multiple materials and steps leading to potential strength and cost issues
Solution Approach 1:
The patent combines the mold compound and underfill into a single integrated material system. The mold compound is applied to encapsulate the chip assembly and simultaneously serves as the underfill material that flows around and adheres to interconnects, eliminating the need for separate underfill material and application step. This merging reduces manufacturing complexity while improving structural integrity through unified material properties.
Solution Approach 2:
The mold compound performs multiple functions simultaneously: it provides mechanical protection and encapsulation of the chip assembly, acts as an underfill material that adheres to interconnects to reduce stress, and serves as a structural bonding medium. This multi-functionality eliminates the need for separate specialized materials, simplifying the manufacturing process while enhancing overall structural reliability.
2Productivity
If traditional manufacturing processes with separate underfill and mold compound steps are used, then each step can be optimized independently, but the cycle time increases and costs rise
Solution Approach 1:
The patent merges the previously separate underfill material and mold compound into a single material system. Instead of applying underfill material first and then mold compound in sequential steps, the process now applies a unified mold compound that inherently provides both encapsulation and underfill functions, reducing the number of material applications and process steps.
Solution Approach 2:
The mold compound is designed to perform multiple functions that were previously handled by separate materials: it provides the protective encapsulation function of mold compound while simultaneously providing the adhesive and stress-relief functions of underfill material. This universality reduces the quantity of different materials needed while improving manufacturing efficiency.
Data Source
AI summary
Chip manufacturing, including: assembling at least two chips on a layer; and applying mold compound on the at least two chips to the sides and bottom including flowing around interconnects, thereby leaving the top of each of the at least two chips exposed.