Resist Composition Adhesion and Pattern Precision
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Solution Overview
Problem
Existing resist compositions for forming connection terminals on semiconductor chips with protruding electrodes face challenges in achieving precise resist patterns, particularly in ensuring the adhesion and stability of the resist film during the photolithography process, which affects the quality and accuracy of the pattern formation.
Innovation Solution
A resist composition comprising a resin with a specific structural unit, an alkali-soluble resin, an acid generator, and an adhesion improver, applied in a method involving application, drying, exposure, and development, to form a resist pattern with improved solubility and adhesion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional resist composition is used for forming connection terminals, then the photolithography process can be performed, but the adhesion and stability of the resist film are insufficient, leading to poor pattern quality and accuracy
Solution Approach 1:
The patent uses a composite resin system combining polyvinylcyclohexane carboxylate (PVCHC) as the main resin with a specific additive resin having carboxylic acid groups. This composite structure provides both the adhesion needed for reliable pattern formation and the stability required during photolithography processing, resolving the contradiction between pattern accuracy and film reliability.
Solution Approach 2:
The patent optimizes the molecular weight parameters of the resin components (PVCHC with specific weight average molecular weight range and the additive resin with controlled molecular weight) to achieve the desired balance between adhesion and stability. By controlling these physical parameters, the resist film exhibits improved pattern formation accuracy while maintaining reliability during processing.
2Manufacturing precision
If the resist composition is optimized for adhesion, then pattern formation accuracy improves, but the complexity of the composition increases
Solution Approach 1:
The patent introduces an additive resin with specific local properties (carboxylic acid groups) in controlled amounts (0.1-10% by weight) to enhance adhesion at the interface between the resist film and substrate. This localized functional enhancement achieves precise pattern formation without requiring complete redesign of the entire resist composition system.
Solution Approach 2:
The patent controls the molecular weight parameters of the additive resin (weight average molecular weight within specific ranges) to optimize its effectiveness while minimizing its impact on the overall composition. By adjusting these parameters, the patent achieves high pattern precision with a relatively simple compositional framework.
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 resist composition effectively forms precise resist patterns with enhanced adhesion and stability, ensuring accurate and reliable semiconductor microfabrication by improving the solubility and adhesion characteristics during the photolithography process.
Implementation Method 1
exposing the composition layer
Implementation Method 2
an alkali-soluble resin
Data Source
AI summary
A resist composition contains: a resin having a structural unit represented by formula (I), an alkali-soluble resin, an acid generator, and a solvent:wherein Ri51 represents a hydrogen atom or a methyl group, Ri52 and Ri53 each independently represent a hydrogen atom or a C1 to C12 hydrocarbon group, Ri54 represents a C5 to C20 alicyclic hydrocarbon group, Ri55 represents a C1 to C6 alkyl group or a C1 to C6 alkoxy group, and “p” represents an integer of 0 to 4.