Sliding Contact Pin Device for Fine Pitch Semiconductor Testing
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Solution Overview
Problem
Conventional pogo pins face challenges in processing complexity, increased costs due to precision requirements, poor durability, and signal interference/attenuation issues when testing semiconductor chips with fine pitch and high-frequency characteristics.
Innovation Solution
A connector pin device with sliding contact pins and a flexible insulating test socket body, featuring a pin mounting part with support and guide members, and silicon oil for stable contact and reduced volume, allowing for reliable and stable electrical characteristics and extended durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional pogo pins are used with fine pitch (0.30 mm or less), then the distance between conduction parts is reduced, but processing cost increases due to precision requirements and durability decreases
Solution Approach 1:
The connector is divided into upper and lower housings that can be assembled together, with each housing containing multiple pins. This segmentation allows for easier manufacturing of individual components while maintaining fine pitch overall structure, reducing the processing difficulty associated with creating entirely fine-pitch structures in a single piece.
Solution Approach 2:
The pins are inserted into recesses formed in the housings, creating a nested structure where pins fit within the housing cavities. This nesting approach simplifies the manufacturing process by allowing pins to be positioned and secured within pre-formed recesses rather than requiring precise positioning in solid material, thereby reducing manufacturing precision requirements.
2Quantity of substance
If the number of pogo pins is increased to several hundreds or thousands, then more connection parts are available, but processing cost increases due to two-stage covering process
Solution Approach 1:
Multiple pins are arranged in arrays within the upper and lower housings, and the housings are assembled together to form a complete connector. This merging approach allows for efficient processing of large numbers of pins by treating them as integrated arrays rather than individual components, reducing the complexity of the overall processing operation.
Solution Approach 2:
The housing structure serves multiple functions: it provides mechanical support for the pins, defines the spacing and positioning, and acts as the connection interface. This multi-functionality eliminates the need for separate structural elements and fastening mechanisms, simplifying the processing of connectors with large numbers of pins.
3Length of moving object
If plunger diameter is reduced to 0.15 mm or less for fine pitch, then the pin size is reduced, but durability decreases due to poor resistance to repeated use
Solution Approach 1:
The connector employs metal pins with plated surfaces (such as gold or other conductive coatings) combined with plastic or polymer housings. This composite construction allows the pins to have small diameters for fine pitch while the plated surfaces and material composition provide enhanced durability and resistance to wear from repeated contact operations.
4Length of moving object
If spring becomes thin and slim to reduce diameter, then the overall size is reduced, but elasticity is lost due to overcurrent
Solution Approach 1:
The spring design modifies parameters such as wire diameter, coil diameter, and number of active coils to optimize the balance between size and elasticity. By carefully selecting these parameters, the spring can maintain adequate elastic properties for reliable contact pressure even with reduced overall dimensions, preventing loss of elasticity due to overcurrent or excessive compression.
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 enables reliable and stable electrical characteristics, improved durability, and maintained frequency stability even at high frequencies, while reducing processing costs and ensuring secure sliding properties between pins.
Implementation Method 1
sliding contact pins... silicon oil for stable contact and reduced volume... secure sliding properties between pins
Data Source
AI summary
A connector pin device includes a test socket body made of a flexible insulating material and including a pin mounting part in which mounting holes have been formed and a support part supporting the pin mounting part, sliding contact pins respectively formed in the mounting holes and each including a first contact pin having a first end externally exposed and a second end located within the mounting hole and a second contact pin having a first end externally located on the side opposite the first end of the first contact pin and a second end located within the mounting hole, wherein the first and second ends of the first and the second contact pins are provided to slide and come into contact with each other, and an cavity portion formed in a portion where the second ends of the sliding contact pins in the mounting hole are located.