Insulating Substrate Groove Structure for Stronger Lead Terminal Bonding
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Solution Overview
Problem
Existing insulating components for wireless communication devices, such as those described in Japanese Unexamined Patent Application Publication No. 2006-179839, face challenges in securely fixing lead terminals to metal layers due to constant-width grooves that do not effectively hold a sufficient bond, leading to potential signal transmission issues and mechanical stress.
Innovation Solution
The insulating component features a plate-like substrate with a groove that extends from the upper surface to the side surface, containing a metal layer and a bond that includes a ridge within the groove, allowing for a more secure fixation of the lead terminal with the bond placed between the ridge and the terminal, enhancing the strength of the joint and reducing stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant-width grooves are used to fix lead terminals, then the structure is simple and easy to manufacture, but the bond cannot hold a sufficient amount between the metal layer and the lead terminal
Solution Approach 1:
The groove structure transitions from a uniform constant-width design to a variable-width design with a narrowed portion. This local variation in geometry allows the groove to provide enhanced bond holding capacity at the critical location (narrowed portion) while maintaining simplicity elsewhere, thereby improving joint strength without significantly increasing overall device complexity
Solution Approach 2:
The groove width parameter is changed from constant to variable along its length. By introducing a narrowed portion with reduced width, the groove can accommodate and hold a sufficient amount of bond material at the critical fixation point, directly addressing the insufficiency of constant-width grooves while maintaining manufacturing feasibility
2Strength
If more bond is used to secure the lead terminal, then the joint strength improves, but excess bond may cause manufacturing issues and increased complexity
Solution Approach 1:
The narrowed portion of the groove creates a localized region with reduced cross-sectional area, which naturally limits the amount of bond material that can be accommodated. This local geometric constraint ensures sufficient bond holding capacity at the critical joint location while preventing excess bond accumulation, thereby maintaining ease of manufacture
Solution Approach 2:
The narrowed portion of the groove acts as an intermediary structure that mediates between the need for sufficient bond quantity and the need to prevent excess bond. By providing a controlled geometric constraint, it ensures the bond is held in the appropriate amount without requiring complex manufacturing processes
Data Source
AI summary
An insulating component includes an insulating substrate, a metal layer, a bond, and a lead terminal. The plate-like insulating substrate has a groove continuous from its upper to side surfaces. The metal layer includes a first metal layer on the upper surface of the insulating substrate and a second metal layer on an inner surface of the groove continuous with the first metal layer. The bond is on an upper surface of the metal layer. The lead terminal is on an upper surface of the first metal layer with the bond in between, and overlaps the grooves. The bond includes a first bond fixing the lead terminal to the first metal layer and a second bond on an upper surface of the second metal layer continuous with the first bond. The groove includes an inner wall having a ridge. The second bond is between the ridge and the lead terminal.