Sealing Resin Depressions for Radiating Members in Electronic Modules
Solution Overview
Problem
Existing heat management modules in electronic equipment have limited design flexibility due to the need for spacers to prevent damage during laser processing of radiating members, which can lead to inefficient heat radiation and potential component damage.
Innovation Solution
A module design featuring a wiring substrate with components and a sealing resin layer containing depressions for radiating members, allowing for efficient heat transfer without the need for spacers, and incorporating radiator elements that overlap and do not overlap heat-generating components, thereby enhancing design flexibility and heat radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spacers are used to prevent damage to components during laser processing, then component reliability is improved, but device complexity and design flexibility deteriorate
Solution Approach 1:
The invention removes the spacer component entirely from the module structure. Instead of using a spacer to prevent damage during laser processing, the patent forms depressions directly in the sealing resin layer, allowing radiating members to be positioned without requiring additional protective components. This extraction of the spacer element simplifies the overall device structure while maintaining component protection through the depression geometry.
Solution Approach 2:
The depressions are formed in the sealing resin layer before the radiating members are positioned. This preliminary formation of the depression structure allows the radiating members to be placed directly into the pre-formed cavities, eliminating the need for spacers during the assembly process. The preliminary action of creating the depression geometry provides built-in protection and positioning functionality.
2Reliability
If spacers are used to prevent damage during laser processing, then component protection is improved, but design flexibility deteriorates
Solution Approach 1:
The spacer component is completely removed from the design. The protective function previously provided by spacers is replaced by the depression structure formed directly in the sealing resin layer. This allows for greater design flexibility as the radiating members can be positioned directly in the depressions without being constrained by spacer geometry, enabling more adaptable thermal management designs.
Solution Approach 2:
The sealing resin layer is modified locally by forming depressions only in specific regions where radiating members need to be positioned. This local modification approach maintains the integrity of the sealing resin layer while providing targeted protection and positioning functionality. The depression depth and geometry can be varied locally to optimize protection for different components, enhancing design flexibility.
3Loss of energy
If radiating members are positioned closer to heat-generating components, then heat radiation efficiency is improved, but component damage risk increases
Solution Approach 1:
The radiating members are nested within the depressions formed in the sealing resin layer. This nesting arrangement allows the radiating members to be positioned very close to the heat-generating components (improving heat transfer efficiency) while the depression walls provide physical protection against damage. The sealing resin material fills the space between the radiating members and components, providing both thermal coupling and mechanical protection.
Solution Approach 2:
The sealing resin layer acts as an intermediary between the radiating members and the heat-generating components. The depressions allow the radiating members to penetrate close to the components while the resin material provides a protective buffer. This intermediary structure enables close proximity for efficient heat transfer while preventing direct contact that could cause damage during assembly or operation.
4Manufacturing precision
If depressions are formed deep enough to reach components, then radiating member positioning precision is improved, but component damage risk increases
Solution Approach 1:
The depressions are formed with controlled depth that is sufficient to provide precise positioning of radiating members but does not penetrate deep enough to damage the underlying components. The depression depth is optimized locally in different regions to achieve the desired balance between positioning precision and component protection. The sealing resin material provides a cushioning effect at the bottom of the depressions, preventing direct contact with components.
Solution Approach 2:
The depression structure provides beforehand cushioning by creating a cushioned cavity filled with sealing resin material. This cushioning layer prevents direct contact between the radiating members and the components, protecting against damage during assembly and operation. The depression geometry is designed to provide adequate cushioning while maintaining precise positioning of the radiating members.
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 configuration improves design flexibility and enhances heat radiation efficiency by allowing for closer proximity of radiating members to heat-generating components, reducing the risk of component damage and deformation due to thermal expansion differences.
Implementation Method 1
heat generated from the first component can be efficiently radiated by the radiating member
Implementation Method 2
heat generated from the first component can be efficiently radiated by the radiating member
Data Source
AI summary
A module with a high degree of design flexibility and excellent radiation characteristics is provided. The module includes a multilayer wiring substrate, mounting components mounted on an upper surface of the multilayer wiring substrate, a sealing resin layer sealing the mounting components, a plurality of depressions in an upper surface of the sealing resin layer, and radiators set in the depressions. The mounting components are components whose amounts of heat generated are smaller than those of the mounting components. A gap between a bottom of each of the depressions arranged in a region overlapping each of the mounting components and the mounting component is shorter than a gap between the bottom of each of the depressions arranged in a region overlapping each of the mounting components and the mounting component as seen from a direction perpendicular to the upper surface of the multilayer wiring substrate.