Conductive Die Attach Film With Embedded Metal Strips for Heat Dissipation
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Solution Overview
Problem
Semiconductor dies in a stack experience significant heat dissipation disparities due to high thermal resistance in conventional die attach films, leading to uneven operating temperatures and potential damage from excessive heat.
Innovation Solution
Implementing a conductive adhesive assembly with embedded metal strips that enhance thermal conductivity between semiconductor dies, reducing thermal resistance and promoting uniform temperature distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional die attach films are used, then adhesive attachment between dies is provided, but thermal resistance is high leading to poor heat dissipation
Solution Approach 1:
The patent uses a composite material structure consisting of an adhesive film with embedded conductive elements (metal strips or particles). This composite combines the adhesive properties of the polymer-based film with the high thermal conductivity of metal elements, achieving both reliable die attachment and improved heat dissipation. The conductive elements are distributed within the adhesive matrix to create a material that simultaneously provides mechanical bonding and thermal conduction pathways.
Solution Approach 2:
The invention changes the thermal conductivity parameter of the die attach material by incorporating conductive elements. The adhesive film's thermal conductivity is enhanced from typical conventional values (0.2-0.4 W/mK) to significantly higher values by adding metal strips or particles, thereby transforming the material's thermal performance while maintaining its adhesive function.
2Strength
If conventional die attach films are used, then die attachment is achieved, but thermal resistance causes uneven temperature distribution and potential die damage
Solution Approach 1:
The conductive adhesive assembly acts as an intermediary between the semiconductor dies and the heat dissipation system. The embedded conductive elements create efficient thermal pathways that mediate heat transfer from the die interfaces through the attach film to the underlying heat dissipation structures, preventing heat accumulation and protecting dies from thermal damage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The conductive adhesive assembly improves heat dissipation and temperature uniformity across the die stack, maintaining operating temperatures below maximum limits and preventing damage, while maintaining a similar footprint.
Implementation Method 1
one or more conductive elements embedded in an adhesive film... improved heat dissipation and temperature uniformity... improved thermal conductivity between adjacent dies
Data Source
AI summary
Implementations described herein relate to various semiconductor device assemblies. In some implementations, an adhesive assembly configured for semiconductor die attachment includes one or more adhesive films capable of semiconductor die attachment, and one or more conductive elements embedded in the one or more adhesive films.