Insulating Adhesive Sheet for Clean Peeling After Reflow
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Solution Overview
Problem
Existing thermal insulation materials used in non-volatile memory manufacturing face issues with adhesive layers remaining on adherends after a reflow step, compromising peelability.
Innovation Solution
A sheet comprising a thermal insulation layer with specific bulk strength and adhesive layer with defined peel strength, where the bulk strength of the insulation layer exceeds the peel strength after a thermal history, ensuring improved peelability post-reflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thermal insulation material with an adhesive layer is used to provide thermal insulation during reflow, then thermal insulation performance is improved, but peelability deteriorates because the adhesive layer remains on the adherend after peeling
Solution Approach 1:
The invention changes the physical and chemical parameters of the thermal insulation layer by controlling its bulk strength to be equal to or greater than the 90° peel strength of the adhesive layer after reflow treatment. This parameter control ensures that when peeling occurs, the adhesive layer detaches cleanly with the thermal insulation layer rather than remaining on the adherend, thus resolving the peelability issue while maintaining thermal insulation performance
Solution Approach 2:
The invention uses a composite structure consisting of an adhesive layer and a thermal insulation layer with specific material properties. The thermal insulation layer is designed with bulk strength ≥ 90° peel strength of the adhesive layer, creating a composite material system where the relative strength relationship between layers controls the peeling behavior, allowing both thermal insulation and easy peelability to be achieved
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 sheet provides excellent peelability after a reflow step, maintaining thermal insulation properties and preventing adhesive residue on adherends.
Implementation Method 1
a sheet including: a thermal insulation layer; and an adhesive layer
Data Source
AI summary
A sheet including a thermal insulation layer and an adhesive layer, in which a bulk strength of the thermal insulation layer after being subjected to a thermal history of increasing temperature from 25 to 200° C. at a temperature increase rate of 47° C./min and then increasing temperature from 200 to 260° C. at a temperature increase rate of 38° C./min, is greater than a 90° peel strength of the adhesive layer after being subjected to the above-described thermal history.