Quick Coupling Probe Head High-Frequency Signal Stability
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Solution Overview
Problem
Conventional probe heads face challenges in efficiently testing DUTs with high-frequency signal contact points of different pitches, due to mechanical and electrical contact issues during coupling, and the need for stable high-frequency signal transmission during three-dimensional movements.
Innovation Solution
The quick coupling probe head incorporates both mechanical and coaxial connectors on its base, allowing for secure mechanical fixation and stable high-frequency signal transmission. The coaxial connector is positioned higher than the mechanical connector to ensure flatness and prevent signal interference, and an alignment mechanism is used to reduce position offsets and enhance electrical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both mechanical and coaxial connectors are equipped on the base for high-frequency signal transmission, then the probe head can be mechanically secured and quickly connected to the test machine, but the position arrangement of connectors becomes complex and may cause cable entanglement during movement
Solution Approach 1:
The patent positions the coaxial connector at a different height (vertical dimension) than the mechanical connector, with the coaxial connector extending higher above the base surface. This vertical separation prevents cable entanglement during probe head movement while maintaining both mechanical and electrical connection stability.
2Stability of the object's composition
If the coaxial connector is positioned higher than the mechanical connector, then cable entanglement is prevented during three-dimensional movement, but the manufacturing precision requirement for connector positioning increases
Solution Approach 1:
The base includes pre-formed positioning structures such as positioning holes or recesses that guide the connectors into their correct positions during assembly. The coaxial connector is pre-positioned at a specific height above the base surface, ensuring proper spatial relationship before final assembly, thereby reducing the actual manufacturing precision requirements.
3Productivity
If multiple connectors are arranged on the base for quick coupling, then the connection speed with test machine is improved, but the alignment precision between mechanical and coaxial connectors becomes more difficult to maintain
Solution Approach 1:
The patent introduces a positioning mechanism as an intermediary element between the mechanical and coaxial connectors. This positioning structure ensures that when the mechanical connector is aligned, the coaxial connector automatically aligns as well, maintaining precise relative positioning between both connectors during quick coupling operations.
Data Source
AI summary
The present invention provides a quick coupling probe card, utilized to test circuit board. The quick coupling probe card comprises a base, a coaxial connector, mechanical connector, and probe holding part, wherein the base has a first surface and a second surface corresponding to the first surface, the coaxial connector arranged on the base has one end above the first surface, and is coupled to the test machine for transmitting the high frequency signal, the mechanical connector is arranged on the first surface for coupling to the test machine, and is closer to a center of the base than the coaxial connector, and the probe holding part, arranged on the second surface and utilized to couple to the coaxial connector, has one end connected to a high frequency probe corresponding to one specific kind of the different kinds of pitches.