Grooved Cover Partition for Electronic Housing Bonding
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Solution Overview
Problem
The existing electronic housings with microchips and light radiation sensors face issues due to the bonding material creeping by capillarity, which can corrode chip connections, cover attachment strength being unpredictable, and light radiation distortion from discontinuities in the bonding material.
Innovation Solution
The electronic housing design incorporates an accumulation and containment recess in the cover partition, including a main groove and secondary grooves, to manage the bonding material, ensuring it does not reach the sensors and maintaining light-tight seals, with optional vents for easier material penetration during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bonding material is applied between the partition and the receiver chip, then the cover attachment strength is improved, but the bonding material creeps by capillarity and corrodes the front connecting pads or covers the sensors
Solution Approach 1:
The patent introduces an intermediary structure (the groove in the partition) between the bonding material and the harmful areas (connecting pads and sensors). This groove acts as a containment channel that guides the bonding material to specific locations, preventing it from creeping onto the connecting pads and sensors while still providing adequate bonding strength.
Solution Approach 2:
The patent extracts the harmful effect of bonding material creep by providing a dedicated containment space (groove) that separates the bonding material from the sensitive areas. The bonding material is effectively 'taken out' from the path between the partition and the chip surface, and confined to the groove structure.
2Strength
If bonding material is applied to attach the cover, then the attachment strength is improved, but the attachment strength becomes unpredictable due to discontinuities in the bonding material
Solution Approach 1:
The groove structure is pre-formed in the partition before bonding material application. This preliminary structural feature ensures that the bonding material is guided into the correct position and maintains continuous contact along the bonding interface, preventing discontinuities that would lead to unpredictable attachment strength.
Solution Approach 2:
The patent applies local quality by creating a groove with specific geometric characteristics (depth, width, length) that are optimized for bonding material containment. This localized structural modification ensures uniform bonding material distribution and continuous bonding along the partition-chip interface, making attachment strength predictable.
3Measurement precision
If the bonding material is continuous, then light radiation detection accuracy is improved, but the manufacturing process becomes more difficult due to precise material placement requirements
Solution Approach 1:
The groove structure in the partition provides self-guidance for the bonding material, causing it to naturally follow the groove contours and maintain continuity. This self-service mechanism eliminates the need for complex external guidance systems or precise manual placement, making it easier to manufacture while ensuring continuous bonding for accurate light radiation detection.
Solution Approach 2:
The groove acts as an intermediary structure that mediates between the bonding material application process and the requirement for continuous bonding. It provides a physical pathway that ensures material continuity without requiring extremely precise placement control, thus improving ease of manufacture while maintaining detection accuracy.
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 design prevents bonding material from reaching the sensors, ensuring accurate light radiation detection and predictable attachment strength, while facilitating easier manufacturing by maintaining a continuous and light-tight seal.
Implementation Method 1
a bonding material interposed between on the one hand the support plate and the chip and on the other hand the peripheral wall and the cover partition
Implementation Method 2
bonding material, interposed between the partition and the receiver chip, creeps by capillarity
Data Source
AI summary
A microchip has a rear face attached to a front mounting face of a support plate. An encapsulation cover for the microchip is mounted to the support plate. The encapsulation cover includes a front wall, a peripheral wall extending from the front wall and an inside partition extending from the front wall and between opposite sides of the peripheral wall. The inside partition passes locally above the microchip to delimit two cavities. A bonding material is interposed between encapsulation cover and the support plate and microchip. An end part of the inside partition of the cover, adjacent to the front face of the microchip, include an accumulation and containment recess that is configured to at least partly receive the bonding material.