Loader Frame Clamping for Flat Preheating of Resin-Molded Carriers
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Solution Overview
Problem
Thinner and larger carriers used in semiconductor production tend to bend during transportation, leading to non-uniform heating and increased heating time, which results in molding defects and potential damage to brittle carriers.
Innovation Solution
A resin molding apparatus with a loader that includes a frame body and chuck claw to securely hold and correct the workpiece, ensuring uniform heating by sandwiching the workpiece's outer edge portion and controlling the pressing force and speed to prevent bending and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thinner and larger carriers are used to improve productivity and molding quality, then productivity and molding quality are improved, but the workpiece tends to bend during transportation
Solution Approach 1:
The frame body applies preliminary pressing action to the workpiece before preheating to correct bending in advance. The pressing operation is performed prior to the heating process, preventing the bending from causing non-uniform heating and subsequent molding defects.
Solution Approach 2:
The frame body is divided into multiple pressing portions that can independently contact different regions of the workpiece. This segmentation allows targeted pressing at specific bending locations while maintaining overall workpiece stability during transportation and preheating.
2Temperature
If a bent workpiece is preheated while placed on a preheating unit, then preheating is performed, but non-uniform heated state occurs causing molding defects
Solution Approach 1:
The frame body corrects workpiece bending before the preheating process begins. By flattening the workpiece in advance, the entire surface can make uniform contact with the preheating unit, ensuring even heat distribution and preventing molding defects caused by non-uniform heating.
Solution Approach 2:
The frame body applies counteracting pressure to prevent the workpiece from maintaining its bent state during preheating. By opposing the bending force beforehand, the workpiece is positioned in a flat state that enables uniform thermal contact with the preheating unit.
3Temperature
If a bent workpiece is preheated, then preheating is performed, but heating efficiency is poor and heating time increases
Solution Approach 1:
The frame body flattens the workpiece before preheating to maximize thermal contact area. This preliminary flattening action ensures that the entire workpiece surface contacts the preheating unit, significantly improving heat transfer efficiency and reducing the time required to achieve uniform heating.
4Shape
If a thin and brittle carrier is suddenly pressed against the preheat stage, then bending correction is attempted, but the carrier may be damaged
Solution Approach 1:
The frame body is designed with movable pressing portions that can apply gradual, controlled pressure to the workpiece. The dynamic adjustment capability allows the pressing force to be increased slowly, preventing sudden impacts that could damage thin and brittle carriers while still achieving effective bending correction.
Solution Approach 2:
The frame body structure incorporates cushioning elements or progressive pressing mechanisms that absorb and distribute impact forces. This beforehand cushioning protects the fragile carrier from damage by preventing sudden, concentrated pressure during the bending correction process.
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 apparatus effectively corrects workpiece bending during preheating, improves heating efficiency, and prevents molding defects, enhancing production efficiency and reducing the risk of carrier damage.
Implementation Method 1
when a workpiece is put into a molding die that has been heated to a predetermined temperature, heat is taken from the heated molding die into the workpiece
Data Source
AI summary
To provide a resin molding apparatus capable of correcting the bending of a workpiece during preheating or the like, improving production efficiency, and preventing the occurrence of defective products. A resin molding apparatus according to the present invention includes: a molding die which performs resin molding of a workpiece W having an electronic component mounted inside a carrier; and a loader which transports the workpiece, the loader includes a frame body which comes into contact with and separates from an outer edge portion of an upper surface of the workpiece, a moving device which moves the frame body up and down, and a chuck claw which comes into contact with an outer edge portion of a lower surface of the workpiece, and the frame body includes a contact portion which is provided over the entire circumference of the outer edge portion in the upper surface of the workpiece.