Vapor Reflow Chamber Layout for Concurrent Substrate Processing
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Solution Overview
Problem
The solder reflow process in existing vapor phase soldering technologies has low productivity and efficiency due to the sequential processing of substrates, which results in prolonged processing times.
Innovation Solution
A solder reflow apparatus with a reflow chamber divided into multiple regions, where a stage module moves substrates through different temperature zones for dipping, pre-heating, and reflowing, allowing simultaneous processing of multiple substrates by positioning them at varying heights along a rail, enabling continuous operation while one substrate undergoes the reflow process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a solder reflow apparatus processes one substrate at a time sequentially, then the processing structure is simple, but the productivity is low
Solution Approach 1:
The reflow chamber is divided into multiple regions (first region for dipping, second region for pre-heating, third region for reflowing) with different temperature zones. The heating element provides different temperature conditions in each region, allowing simultaneous multi-stage processing of multiple substrates at different process stages, thereby improving productivity without requiring completely separate processing chambers.
Solution Approach 2:
The patent introduces a vertical dimension by positioning substrates at different heights within the same reflow chamber. The stage module can adjust substrate positions vertically to expose different areas to the heating element, enabling multiple substrates to undergo different processing stages (dipping, pre-heating, reflowing) simultaneously at different height levels, thus increasing throughput while maintaining a compact single-chamber structure.
2Productivity
If multiple substrates are processed simultaneously in different regions with different temperatures, then the productivity increases, but the control complexity increases
Solution Approach 1:
A single heating element serves multiple functions by providing different temperature conditions to different regions of the reflow chamber simultaneously. The heating element can heat the entire chamber while the stage module positions substrates at different heights and locations, allowing one heating component to fulfill multiple temperature control requirements for different process stages, thereby reducing the need for multiple independent heating systems and simplifying overall control.
Solution Approach 2:
The stage module acts as an intermediary between the single heating element and multiple substrates. It precisely positions substrates at different heights and locations within the chamber, controlling which substrates are exposed to the heating element at any given time. This intermediary mechanism enables complex multi-stage processing using a simple single-zone heating system, reducing control complexity while maintaining high productivity.
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
This approach significantly reduces the overall time required for the solder reflow process, thereby increasing productivity and efficiency by allowing multiple substrates to be processed concurrently.
Implementation Method 1
A heater heats the heat transfer fluid in the reflow chamber
Implementation Method 2
The heat transfer fluid transfers heat to a solder for mounting an electronic part on a substrate
Implementation Method 3
After transferring the heat, the heat transfer fluid may be condensed to form a liquid
Data Source
AI summary
A solder reflow apparatus may include a reflow chamber receiving a heat transfer fluid. The heat transfer fluid transfers heat to a solder for mounting an electronic part on a substrate. A heater heats the heat transfer fluid in the reflow chamber. A rail is arranged in an upper region of the reflow chamber and extends along a horizontal direction. A stage module may be movably connected to the rail and supports the substrate. The controller controls a positioning of the stage module to move the substrate supported by the stage module to different heights in a vertical direction.