English Translation

I. What is a Semiconductor FerroOrange Probe

FerroOrange probes for semiconductor/wafer testing (distinct from biological fluorescent probes) are high-hardness test probes made of tungsten or rhodium-plated tungsten.

II. Application Fields of FerroOrange Probes

Wafer CP testing, chip FT testing, and burn-in testing

Mass production testing of conventional-thickness copper and aluminum bonding pads

Testing of circuits requiring high frequency, high speed, and low contact resistance

Applications demanding high reliability and long service life (automotive electronics, industrial chips)

Conventional and mid-to-high-end electrical testing with probe stations

III. Core Advantages of FerroOrange Probes

1. Strong Mechanical Properties and Long Service Life

Ultra-high hardness and wear resistance: Tungsten/rhodium-plated tungsten offers exceptional hardness, with minimal tip wear or deformation, suitable for millions of high-frequency test cycles.

Fatigue resistance and low breakage risk: The rhodium plating enhances toughness, greatly reducing brittle fracture risks even under high pressure and fine-pitch dense testing.

Stable tip geometry: Maintains high precision of the probe tip geometry, ensuring consistent contact for high-precision and repetitive testing.

2. Excellent Electrical Performance

Low and stable contact resistance: Effectively penetrates oxide layers on aluminum/copper pads, with contact resistance typically ranging from 200–500 mΩ, ideal for low-resistance, high-speed, and high-frequency testing.

High current and temperature resistance: Tungsten has an extremely high melting point (≈3410°C), enabling operation under high current and high-temperature conditions without ablation.

Good signal integrity: Suitable for RF, high-speed digital, and analog circuit testing, with low signal attenuation and noise.

3. User-Friendly Design and Compatibility

Wide compatibility: Works with various probe stations and probe cards, supporting wafer CP, FT, burn-in, and reliability testing.

Low adhesion and easy cleaning: Rhodium plating reduces sticking to aluminum/copper pads, minimizes metal debris pickup, and lowers cleaning frequency.

Cost-effective: More affordable than rhenium-tungsten or palladium alloys, with balanced performance for large-scale mass production.

IV. Main Limitations of FerroOrange Probes

1. Material and Process Limitations

Oxidation tendency of pure tungsten: Unplated pure tungsten easily forms high-resistance oxide layers in air, increasing contact resistance and unstable signals, requiring regular maintenance.

High hardness yet residual brittleness: Probes may break under extreme force or impact; risks scratching ultra-soft pads (ultra-thin aluminum, gold).

Difficult machining: Tungsten is hard to process, leading to high costs and long lead times for ultra-precision tips (<5 μm).

2. Application Restrictions

Not suitable for ultra-soft/ultra-thin pads: Risks physical damage to gold pads, ultra-thin aluminum pads, and sensitive MEMS structures.

Suboptimal performance in extreme RF applications: Signal integrity is inferior to dedicated beryllium-copper or palladium alloy probes in millimeter-wave and ultra-high-frequency (>50 GHz) scenarios.

Limited extreme high-current capacity: For ultra-high current (>10 A) applications, beryllium-copper or copper-tungsten probes with higher conductivity are preferred.

3. Maintenance and Cost Considerations

Performance degradation after rhodium layer wear: Once the rhodium plating wears through, the underlying tungsten oxidizes easily, increasing contact resistance and requiring timely replacement.

Higher upfront cost than standard tungsten probes: Rhodium plating adds manufacturing cost, making them more suitable for high-reliability applications.

V. Probe Manufacturer

Cindbest is headquartered in Shenzhen, Guangdong Province, with sales networks in Hong Kong, Beijing, Shanghai, Changsha, Xi’an, Chengdu, and other cities. Since its establishment, the company has provided research-grade probe test systems to major domestic universities (including 95% of China’s 985 and 211 universities), research institutes, and semiconductor companies, and has become a leading domestic manufacturer and supplier of probe test systems.