Underfill Film Stability via Migratable Component Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Multilayer articles with underfill film layers face instability due to migration of migratable components, affecting their worklife and storage stability.

Innovation Solution

Incorporating a combination of film-forming binder resin, maleimide, nadimide, acrylate resin, and filler in the underfill film layers, with optional epoxy resin, to manage the distribution of migratable components and enhance stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If underfill film layers are used in multilayer articles, then adhesion and structural integrity are improved, but migration of components occurs leading to reduced worklife and storage stability

Engineering Contradiction:

Improveadhesion and structural integrityVSAvoidworklife and storage stability

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent modifies the chemical composition parameters of the underfill film by incorporating specific resins (epoxy, phenolic, polyester, polyimide, polyamide, or acrylic) and controlling the ratio of migratable to non-migratable components. This parameter change optimizes both adhesion properties and compositional stability, preventing migration while maintaining structural integrity.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material formulation by combining multiple resin types with fillers and controlled migratable components in the underfill film. This composite approach creates a material that simultaneously achieves strong adhesion to semiconductor substrates and resistance to component migration during storage and worklife.

Inventive Principle:

Principle #40Composite materials

2Strength

If migratable components are present in underfill film, then adhesion properties are enhanced, but distribution of components becomes uneven affecting stability

Engineering Contradiction:

Improveadhesion propertiesVSAvoiduniformity of component distribution

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by creating zones within the underfill film with different concentrations of migratable and non-migratable components. The formulation allows migratable components to be strategically distributed to provide adhesion at critical interfaces while non-migratable components maintain uniform distribution for overall stability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent controls the concentration parameters of migratable components within specific ranges to achieve optimal adhesion without excessive migration. By adjusting the ratio and types of resin components, the patent balances adhesion enhancement with uniform component distribution.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20200009830A1Worklife improvement for multilayer comprising at least one underfill film and methods for the preparation and use thereof

Publication Date: 2020.01.09 HENKEL KGAA

AI summary

Provided herein are multilayer articles comprising at least one underfill film layer. In certain aspects, there are also provided methods for improving the worklife stability of such articles. In certain aspects, there are also provided methods for improving the storage stability of such articles. In certain aspects, there are also provided methods for making such articles. In certain aspects, there are also provided stabilized articles produced by the methods described herein.