Memory Card Test Pin Ink Coating for ESD Protection
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Solution Overview
Problem
Existing memory cards face challenges with exposed test pins that are susceptible to electrostatic discharge and require additional costly packaging or labels for protection, which can impede ejection and increase manufacturing time.
Innovation Solution
The use of printed ink to cover test contacts on memory cards, providing electrical isolation and camouflage without the need for additional packaging or labels, allowing for efficient and cost-effective production in a small form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test pins are exposed on memory cards, then testing functionality is maintained, but electrostatic discharge susceptibility increases and additional protective packaging is required
Solution Approach 1:
A plastic cover is introduced as an intermediary component between the exposed test pins and the external environment. This cover physically shields the test pins from electrostatic discharge while maintaining access for testing operations, thus protecting against harmful factors without compromising functionality.
Solution Approach 2:
A thin plastic cover is used to encapsulate and protect the exposed test pins. This flexible protective layer provides electrostatic shielding and physical protection while being thin enough to maintain the compact form factor of the memory card and allow for testing access.
2Object-affected harmful factors
If plastic housing is used to cover test pins, then electrostatic discharge protection is provided, but manufacturing cost increases
Solution Approach 1:
The protective cover for test pins is merged with the existing plastic housing structure of the memory card. By integrating the cover into the housing design, the number of separate components is reduced, assembly steps are simplified, and overall manufacturing cost is decreased while maintaining electrostatic discharge protection.
3Object-affected harmful factors
If labels are applied to cover test pins, then electrostatic discharge shielding is achieved, but manufacturing time increases
Solution Approach 1:
The protective function is extracted from the labeling process and integrated into the molded plastic housing itself. By incorporating the protective cover as an integral part of the housing structure during molding, the separate labeling step is eliminated, reducing manufacturing time and process complexity while maintaining electrostatic discharge shielding.
4Object-affected harmful factors
If labels are used to hide test pins, then test pin visibility is reduced, but ejection friction increases
Solution Approach 1:
The mechanical labeling approach is replaced with a molded plastic structure that integrates the protective cover into the housing. This eliminates the need for separate label materials that create friction, and the smooth molded surfaces reduce ejection friction while still hiding the test pins from view.
Data Source
AI summary
Improved techniques to produce integrated circuit products are disclosed. The improved techniques permit smaller and less costly production of integrated circuit products. One aspect of the invention concerns covering test contacts (e.g., test pins) provided with the integrated circuit products using printed ink. Once covered with the ink, the test contacts are no longer electrically exposed. Hence, the integrated circuit products are not susceptible to accidental access or electrostatic discharge. Moreover, the integrated circuit products can be efficiently produced in a small form factor without any need for additional packaging or labels to electrically isolate the test contacts.