Radiation-Sensitive Resin Composition Water Stabilization
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Solution Overview
Problem
Radiation-sensitive resin compositions exhibit variability in sensitivity over time, leading to inconsistent pattern formation and increased exposure doses, which complicates the pattern formation process and increases costs.
Innovation Solution
A radiation-sensitive resin composition comprising a resin, a polymerizable compound with ethylenically unsaturated bonds, a photopolymerization initiator with an oxime ester compound having a branched or cyclic alkyl group, and water, where the water content is between 0.1% to 2% by mass, stabilizing the sensitivity and preventing degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the radiation-sensitive resin composition is stored for a long period of time, then the composition can be used after preparation or storage, but the sensitivity may increase or decrease leading to variation in pattern size
Solution Approach 1:
The patent applies preliminary action by adding a specific amount of water (0.01-5% by mass) to the radiation-sensitive resin composition during preparation. This preliminary addition of water prevents sensitivity variation that would otherwise occur during storage, thereby maintaining pattern size consistency even after long-term storage. The water acts as a stabilizer that pre-empts the sensitivity drift problem.
Solution Approach 2:
The patent applies parameter changes by controlling the water content parameter within a specific range (0.01-5% by mass). By adjusting this parameter, the composition achieves optimal stability during storage. The specific water content parameter prevents both sensitivity increase and decrease that would otherwise occur during storage, resolving the contradiction between storage duration and pattern consistency.
2Reliability
If the sensitivity of the radiation-sensitive resin composition is low, then the exposure dose increases, but this leads to increased pattern formation time and running costs
Solution Approach 1:
The patent applies parameter changes by optimizing the water content parameter (0.01-5% by mass) to maintain stable sensitivity. This stable sensitivity ensures consistent exposure dose requirements over time, preventing both sensitivity degradation and unnecessary exposure dose increases. The result is maintained productivity with reduced running costs.
Solution Approach 2:
The patent applies feedback by establishing a controlled water content parameter that provides negative feedback against sensitivity variation. The water acts as a buffer that compensates for potential sensitivity drift during storage, ensuring the composition maintains its original sensitivity characteristics and thus maintains efficient pattern formation speed.
3Reliability
If there is variation in sensitivity, then labor is required to set exposure conditions according to the composition, but this increases process complexity
Solution Approach 1:
The patent applies preliminary action by incorporating a specific water content (0.01-5% by mass) during composition preparation. This preliminary action ensures sensitivity consistency throughout storage, eliminating the need for subsequent exposure condition adjustments. The water addition pre-empts the variation problem, maintaining reliability without increasing process complexity.
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 composition maintains good sensitivity and temporal stability, reducing variability in pattern size and formation time, while minimizing the need for frequent exposure condition adjustments and lowering running costs.
Implementation Method 1
a photopolymerization initiator; a polymerizable compound having an ethylenically unsaturated bond
Data Source
AI summary
Provided are a radiation-sensitive resin composition having good sensitivity and excellent temporal stability of the sensitivity, a cured film, a pattern forming method, a solid-state imaging device, and an image display device. The radiation-sensitive resin composition includes a resin, a polymerizable compound having an ethylenically unsaturated bond, a photopolymerization initiator, an organic solvent, and water, in which the photopolymerization initiator includes an oxime ester compound having at least one group selected from a branched alkyl group and a cyclic alkyl group, and the content of water is 0.1% to 2% by mass with respect to the mass of the radiation-sensitive resin composition.