Colored Auxiliary Joining Agent for Semiconductor Mounting
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Solution Overview
Problem
The difficulty in visually identifying the amount of auxiliary joining agent on a substrate and the challenge of maintaining the mounting machine due to the colorless and transparent nature of existing agents, leading to potential insufficiencies in semiconductor device mounting and contamination issues within the machine.
Innovation Solution
A colored auxiliary joining agent with reducing properties is used, which includes a solvent and a colorant, allowing for easy visual identification of the agent's amount and facilitating efficient maintenance by making volatilization and contamination areas easily detectable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a colorless and transparent auxiliary joining agent is used, then the joining process can proceed without visual interference, but the dispensing amount and remaining amount cannot be visually identified
Solution Approach 1:
The patent applies color changes by incorporating a colorant into the auxiliary joining agent, transforming it from colorless and transparent to colored. This allows the dispensing amount and remaining amount to be visually identified, resolving the detection difficulty while maintaining the agent's functional properties for oxide film removal and joint reliability
2Ease of operation
If the mounting machine stops and restarts frequently, then operational errors can be corrected, but the auxiliary joining agent volatilizes and the amount falls below necessary level
Solution Approach 1:
The colored auxiliary joining agent enables visual monitoring of the remaining amount on the substrate. When the machine stops and restarts, operators can immediately see if the auxiliary joining agent has volatilized and if re-dispensing is needed, preventing the amount from falling below the necessary level
3Manufacturing precision
If the auxiliary joining agent is colorless and transparent, then the substrate surface remains clean in appearance, but the degree of contamination and timing of cleaning cannot be identified
Solution Approach 1:
The colored auxiliary joining agent creates visible coloration on contaminated surfaces within the mounting machine. This allows maintenance personnel to easily identify contamination areas and determine when cleaning is needed, while the color fades as the agent volatilizes during normal operation
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 colored agent stabilizes the dispensing amount, prevents semiconductor device mounting with insufficient joining agent, and simplifies machine maintenance by enabling visual detection of remaining agent and contamination areas.
Implementation Method 1
a colored auxiliary joining agent having a reducing property of removing an oxide film on a metal surface
Implementation Method 2
the auxiliary joining agent will gradually volatilize from the substrate
Data Source
AI summary
The purpose is, in mounting a semiconductor device onto a substrate, to make it easy to identify the remaining amount of an auxiliary joining agent, to stabilize the dispensing amount of the auxiliary joining agent, and to prevent a shortage of the auxiliary joining agent. Also for the purpose of efficient maintenance of a mounting machine, provided is an auxiliary joining agent adapted to aid joining of metals and prepared by dissolving a colorant in a solvent having a reducing property of removing an oxide film on a metal surface. The auxiliary joining agent is produced by a method including a step of mixing a solvent having a reducing property of removing an oxide film on a metal surface, and a colorant having a property of dissolving in the solvent.