Shielded Module Grounding Structure With Columnar Conductor
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Solution Overview
Problem
Existing sealing laminate sheets face challenges in ensuring reliable grounding connection and maintaining high shielding performance due to limitations in grounding the electrically conductive material.
Innovation Solution
A module configuration that includes a substrate with components covered by a resin film and a shield film, featuring a first opening for a columnar conductor to pass through, allowing easy and reliable grounding by connecting the shield film to the conductor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hole for grounding connection is provided in the first layer to expose the electrically conductive material, then grounding connection is enabled, but reliable grounding connection cannot be ensured and degree of freedom in grounding connection is low
Solution Approach 1:
The patent transitions from a two-dimensional planar grounding connection (hole in first layer) to a three-dimensional columnar conductor extending vertically through multiple layers. The columnar conductor rises from the electrically conductive material, passes through the first layer, and terminates at a height above the first layer, enabling grounding connections from multiple spatial dimensions and improving both reliability and flexibility.
Solution Approach 2:
The columnar conductor is pre-formed and positioned within the sealing laminate sheet before final assembly. This preliminary preparation of the grounding path allows for easier and more reliable connection to the electrically conductive material, eliminating the need for complex post-assembly grounding procedures and enhancing both reliability and design freedom.
2Object-affected harmful factors
If electrically conductive material is included in sealing laminate sheet for shielding, then shielding performance is improved, but grounding becomes difficult and complex
Solution Approach 1:
The patent combines the shielding function (electrically conductive material in second layer) and grounding function (columnar conductor) into a single integrated structure. The columnar conductor serves dual purposes: it provides the grounding path and simultaneously acts as a connection element that simplifies the overall grounding system, reducing complexity while maintaining effective shielding.
Solution Approach 2:
The columnar conductor acts as an intermediary element between the electrically conductive material (shielding layer) and the external grounding point. This mediator simplifies the connection process by providing a dedicated, pre-positioned pathway for grounding current, eliminating the need for complex routing through multiple layers and components.
Data Source
AI summary
A module includes a substrate having a first surface, components as one or more components mounted on the first surface, a resin film covering the one or more components along a shape of the one or more components and covering part of the first surface, a first shield film formed to overlap the resin film, and a first sealing resin as a sealing resin disposed to cover the first surface, the one or more components, and the first shield film. A stack including the resin film and the first shield film has a first opening. A first columnar conductor is disposed to be electrically connected to the first surface through the first sealing resin and the first opening. The first shield film is electrically connected to the first columnar conductor in the first opening.