Electrical Component Stack With Curved Adhesive Corner Routing
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Solution Overview
Problem
Existing stack designs of electrical components, where a conductive layer is arranged along the side surface of a first electrical component, often suffer from reduced electrical reliability due to sharp turns at corner portions, limiting the downsizing of the second electrical component.
Innovation Solution
A stack design where an adhesive layer with a curved second portion fills the corner portion between the side surface and the mounting surface of the second electrical component, allowing the conductive layer to curve along this portion, eliminating the need for sharp turns and enhancing electrical reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conductive layer is arranged along the side surface of the first electrical component to minimize distance, then the downsizing of the second electrical component is achieved, but the electrical reliability of the conductive layer deteriorates due to sharp right-angle bends at corner portions
Solution Approach 1:
The adhesive layer is formed with a curved surface at the corner portion instead of a sharp right-angle bend. This curved surface allows the conductive layer to follow a gradual curvature path, eliminating stress concentration at sharp corners while maintaining the minimized distance requirement for downsizing the second electrical component.
Solution Approach 2:
The adhesive layer serves as an intermediary structure between the first and second electrical components. By shaping the adhesive layer's corner portion with a curved surface, it mediates the transition of the conductive layer from the side surface to the mounting surface, preventing direct sharp-angle contact and preserving electrical reliability.
2Length of stationary object
If the conductive layer is arranged along the side surface of the first electrical component, then the distance between the pad of the second electrical component and the first electrical component is minimized, but the complexity of forming the conductive layer increases due to sharp bends
Solution Approach 1:
The curved surface of the adhesive layer at the corner portion provides a natural guide for the conductive layer formation process. Instead of requiring complex sharp-angle bending operations, the conductive layer can be deposited or formed to follow the smooth curved surface, simplifying the manufacturing process while maintaining minimized distance.
3Reliability
If the adhesive layer is formed with a curved second portion filling the corner portion, then the conductive layer can curve along it to maintain electrical reliability, but the complexity of forming the insulating layer increases
Solution Approach 1:
The curved surface formation is integrated into the adhesive layer application process itself. By controlling the adhesive dispensing or spreading to naturally form the curved corner portion, the insulating layer formation complexity is minimized while still achieving the curved guide surface needed for reliable conductive layer formation.
Data Source
AI summary
A stack of electrical components has a first electrical component having a first surface, a second surface that is opposite to the first surface and a side surface that is located between the first surface and the second surface; a second electrical component having a third surface on which the first electrical component is mounted, the third surface facing the second surface and forming a corner portion between the third surface and the side surface; an adhesive layer that bonds the first electrical component to the second electrical component, the adhesive layer has a first portion that is located between the second and third surface and a second portion that is made of a same material as the first portion and that fills the corner portion; and a conductive layer that extends on a side of the side surface, curves along the second portion and extends to the third surface.