Connector With Elastic-Support Members For Contact Pressure
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Solution Overview
Problem
Existing connectors for board pads and LGA packages face issues with insufficient contact pressure, complex manufacturing processes, and high costs, as well as stress concentration leading to conductor breakage.
Innovation Solution
A connector design featuring a base member with matrix-arranged contact-attachment portions and openings, combined with elastic-support members and conductive contact films, which absorb size variations and distribute stress evenly, ensuring reliable contact pressure and long connection life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the conductor length is increased to ensure sufficient contact pressure, then the contact pressure is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The connector is divided into modular components: a base member with multiple contact-attachment portions and openings arranged in a matrix, with conductors positioned within these openings. This segmentation allows standardized manufacturing of the base member while enabling flexible conductor arrangement, reducing overall manufacturing complexity while maintaining contact pressure through proper conductor positioning and support structures.
2Reliability
If the conductor is bent at an angle to reduce stress concentration, then the connection reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The base member provides localized support to the conductor at specific positions within the openings, creating regions of different mechanical properties. The conductor is supported at multiple discrete locations rather than uniformly, allowing stress distribution at critical bent portions while maintaining manufacturing feasibility through standardized support structures at predetermined locations.
3Productivity
If the contact-attachment portions are arranged in a dense matrix form, then the connection density is improved, but the stress distribution becomes concentrated
Solution Approach 1:
The conductor extends not only in the vertical direction but also in a diagonal direction crossing both horizontal directions, utilizing three-dimensional space within the openings. This diagonal arrangement allows stress to be distributed along a longer path and across multiple dimensions, reducing stress concentration even when contact-attachment portions are densely arranged in a matrix form.
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
The solution provides a low-cost, reliable connector with sufficient contact pressure and extended lifespan by using elastic-support members and conductive films to distribute stress and absorb size variations, addressing the limitations of existing connectors.
Implementation Method 1
the elastic-support member having an upper end, an attachment surface and a lower end... the elastic-support member being attached to the corresponding contact-attachment portion and projecting upwards and downwards from the base member
Data Source
AI summary
Provided is a connector which ensures a sufficient contact pressure at a low cost and has a long connection life and also provide a fabrication method the connector. The connector 10 comprises a base member 100 and the contacts 200 projecting upwards and downwards of the base member 100. Openings 110 formed on the base member 100 extend in the direction crossing the pitch direction of the contacts 200. The contact 200 has an elastic-support member 220 and a contact film 260 pasted on the elastic-support member 220. The contact film 260 faces the opening 110 so that length of the contact film 260 can be larger than interval between the contacts 200 in the pitch direction. The contact 200 absorbs variations of a size of pads of the connection objects.