Shield Wall Notch Structure for Resin-Molded RF Modules
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Solution Overview
Problem
In high frequency modules, the presence of a groove in the metal wall allows resin to exert pressure on parts other than the upper part, potentially causing the metal wall to collapse during resin molding.
Innovation Solution
The module design includes a plate-shaped metal member with upper and lower notches and foot portions, allowing resin to flow through these notches and preventing pressure-induced collapse during resin layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a groove is provided in the metal wall to allow resin flow, then the resin molding portion can be formed properly, but the metal wall may collapse due to pressure from the resin
Solution Approach 1:
The metal member is segmented by providing notches that divide the plate-shaped portion into multiple sections. This segmentation allows resin to flow through the notches and reduces pressure concentration on any single section, preventing collapse while maintaining structural integrity.
Solution Approach 2:
The notches are strategically positioned at specific locations (upper and lower parts) of the plate-shaped portion where pressure from the resin is most likely to cause collapse. This local modification allows resin flow exactly where needed without compromising overall structural stability.
2Strength
If the metal member has a solid plate structure, then structural strength is maintained, but resin pressure causes collapse during molding
Solution Approach 1:
The solid plate structure is transformed into a segmented structure with notches. The notches create multiple pressure relief zones that distribute and reduce the force exerted by the resin, preventing collapse while maintaining the overall strength of the metal member.
Solution Approach 2:
The notches act as intermediary channels that allow the resin to pass through the metal member structure. This intermediary pathway relieves pressure buildup and prevents direct force transmission that would cause collapse of the plate-shaped portion.
Data Source
AI summary
A metal member includes a plate-shaped portion extending upward from an upper main surface of a substrate, and has a front main surface and a back main surface arranged in the front-back direction when viewed in the up-down direction. A first electronic component is mounted on the upper main surface of the substrate and is disposed in front of the metal member. A second electronic component is mounted on the upper main surface of the substrate and is disposed behind the metal member. A sealing resin layer is provided on the upper main surface of the substrate and covers the metal member and the one or more electronic components. The plate-shaped portion is provided with one or more upper notches extending downward from the upper side. The plate-shaped portion is provided with one or more lower notches extending upward from the lower side.