Micro Test Probe: Precision Probes for High-Density Testing
Micro probes (miniature test probes) generally refer to precision elastic probes with a needle diameter of less than 0.5mm. They fall into two main categories: micro spring probes (Micro Pogo Pins) and MEMS micro probes. Structurally composed of a needle tip, barrel, and spring with gold-plated surfaces, they achieve reliable conduction under minimal force while controlling contact impedance. They maintain stable electrical performance through repeated compression and rebound cycles without damaging tiny pads, BGA balls, or precision contact points.
Core Advantages of Micro Probes
- Ultra-fine needle diameter for fine-pitch testing: Available in Φ0.12mm ultra-fine needles, supporting test pitches of 0.35mm and below. Solves high-density contact testing challenges for BGA, WLCSP, wafer, and camera modules, and integrates into probe cards, test sockets, and ICT/FCT fixtures.
- Low contact impedance, stable high-frequency signals: Beryllium copper base with thick gold plating provides low contact resistance and minimal parasitic parameters. Low signal reflection during 5G RF and high-frequency module testing ensures stable signal transmission, meeting the electrical performance testing requirements for high-frequency chips and mmWave modules.
- Extended service life with excellent consistency: Optimized spring structure maintains stable force after millions of reciprocating test cycles. Needle tips are available in crown, pointed, round, and chamfered styles. Spring force and stroke tolerances are controlled within batches, reducing false rejection rates in mass production fixtures.
- Strong customization capability: Needle diameter, working stroke, spring force, and tip shape can be adjusted on demand. High-temperature resistant versions are available for three-temperature testing environments. Small-batch sampling is supported for fast delivery and validation.
Main Application Fields
- Semiconductor Industry: Wafer testing, IC package testing, advanced 2.5D/3D IC packaging, probe cards, chip test sockets — a core component for chip yield detection.
- Consumer Electronics: AI glasses, smartwatches, camera modules, PCB FCT/ICT functional testing, micro connector conduction detection.
- Optoelectronic Display: Mini LED and Micro LED module contact testing.
- Medical Electronics: Minimally invasive detection modules, medical sensor testing (biocompatible plating options available).
- Precision Test Fixtures: Automated test equipment, spring pin test modules, pogo pin test assemblies.
Micro Probe Selection Guidelines
Selecting a micro probe requires looking beyond needle diameter alone. Four key parameters must be comprehensively evaluated: probe diameter, working stroke, spring force, and contact impedance.
- For tiny pads and extremely fine pitches, prioritize ultra-fine micro probes and select the appropriate tip shape to avoid pad damage.
- For high-frequency signal testing, choose short-stroke, low-inductance micro probes.
- For high-volume production line testing, prioritize high-wear-resistance gold-plated materials to reduce frequent probe replacement costs.
- For high/low temperature testing environments, confirm material temperature resistance to ensure stable spring force across temperature variations.
About Woyo Micro Probe Manufacturer
Shenzhen Woyo Technology Co., Ltd. specializes in the R&D and manufacturing of precision micro probes, pogo pin spring contacts, and test probes. We produce various types of micro test probes with drawing-based customization and sample delivery support. With complete micro-machining and gold-plating production lines, our products are widely used in semiconductor testing, smart wearables, medical electronics, RF modules, and other fields. We collaborate with customers on probe solution evaluation and fixture component selection, providing reliable domestic micro probe solutions.
If you have micro probe customization or sample testing needs, contact us online to request product datasheets and quotations.
Micro Probe FAQ
Q1: What is a micro probe?
A micro probe (miniature test probe) is a precision elastic probe with a needle diameter of less than 0.5mm. It includes two main categories: micro spring probes (Micro Pogo Pins) and MEMS micro probes. Composed of a needle tip, barrel, and spring with gold plating, they are used for fine-pitch, high-density testing in semiconductor, consumer electronics, and medical module applications.
Q2: What test pitch can micro probes support?
Woyo micro probes are available in Φ0.12mm ultra-fine needle diameters, supporting test pitches of 0.35mm and below. They solve high-density contact testing challenges for BGA, WLCSP, chip wafers, camera modules, and similar applications.
Q3: What is the difference between micro probes and regular pogo pins?
Micro probes have thinner needle bodies (typically under 0.5mm) and higher positioning precision, specifically designed for fine-pitch, high-density testing scenarios. Regular pogo pins have larger diameters and are more commonly used for charging connections and signal transmission. Micro probes have higher requirements for contact impedance, high-frequency performance, and life-cycle consistency.
Q4: How do I select the right micro probe?
Evaluate four key parameters: probe diameter, working stroke, spring force, and contact impedance. For tiny pads, prioritize ultra-fine needle diameter and appropriate tip shape. For high-frequency scenarios, choose short-stroke low-inductance models. For production testing, select high-wear gold-plated materials. For temperature extremes, confirm material temperature range.
Q5: Can Woyo Technology customize micro probes?
Yes. Shenzhen Woyo Technology specializes in precision micro probes, pogo pin spring contacts, and test probes. We support customization of needle diameter, working stroke, spring force, and tip shape. High-temperature resistant versions and small-batch sampling are available. We provide solution evaluation, fixture selection support, and sample delivery.