TSK Wafer Probers
A wafer prober is an automated system that precisely aligns probe needles with the contact pads of semiconductor devices on a wafer. Electrical signals from a test system are then applied to evaluate the performance of each die.
Modern wafer probers must provide:
• ultra-high positioning accuracy
• stable probe contact
• automated wafer handling
• compatibility with various wafer sizes
• integration with automated test equipment (ATE)
High-end probers like those produced by TSK use precision motion stages, optical alignment systems, and automated handling robots to achieve repeatable probe accuracy within microns.
Top 10 TSK Wafer Prober Models
Below are ten of the most widely used TSK wafer probing systems in both production fabs and the secondary equipment market.
1. TSK UF3000
The UF3000 is one of the most widely deployed TSK wafer probers for modern semiconductor production.
Key features include:
• support for 200 mm and 300 mm wafers
• automated probe card alignment
• high-throughput wafer handling
• advanced image processing for probe-to-pad alignment
• ±2 μm total positioning accuracy
The UF3000 platform is designed for both mass production memory devices and high-mix logic manufacturing, making it one of the industry’s most versatile wafer probers.
Typical applications:
● logic IC testing
● DRAM / NAND production
● system-LSI manufacturing
● high-volume wafer sort
2. TSK UF3000EX
The UF3000EX is an enhanced version of the UF3000 platform, offering improved automation and expanded testing capability.
Major advantages include:
● advanced wafer alignment systems
● dual robotic wafer transport
● compatibility with multi-site probing
● improved probe mark inspection systems
These features allow the UF3000EX to support modern high-throughput wafer testing environments.
3. TSK UF2000
The UF2000 is a classic 200 mm wafer prober widely used in semiconductor fabs worldwide.
Important capabilities include:
● 4″ to 8″ wafer compatibility
● ±1.5 µm probing precision
● multi-site probing support
● high-rigidity stage design
Even today, the UF2000 remains popular in:
● analog IC production
● MEMS device manufacturing
● power semiconductor fabs
Many mature-node fabs still rely on UF2000 systems because of their reliability and cost efficiency.
4. TSK UF200
The UF200 series represents an earlier generation of TSK wafer probers designed for stable wafer sort operations.
These systems are typically used for:
● engineering wafer testing
● small-volume production lines
● R&D laboratories
The platform offers dependable mechanical performance and relatively simple maintenance requirements.
5. TSK UF200A
The UF200A builds on the UF200 architecture with improvements in motion control, stage accuracy, and probe alignment.
It is commonly used for:
● 6-inch and 8-inch wafer testing
● analog device production
● specialty semiconductor applications
6. TSK UF200S
The UF200S is optimized for stable multi-site probing, allowing simultaneous testing of multiple dies on a wafer.
Advantages include:
● higher test throughput
● improved probing repeatability
● flexible probe card configuration
These characteristics make the UF200S suitable for medium-volume production lines.
7. TSK UF200SA
The UF200SA variant introduces improved automation and enhanced software control.
Typical improvements include:
● automatic wafer alignment
● improved stage control algorithms
● better integration with automated test equipment
8. TSK UF190
The UF190 is designed for smaller wafer sizes and discrete device testing.
Typical features include:
● support for 4-inch to 8-inch wafers
● high-rigidity probing stage
● automated alignment and probing functions
This system is commonly used for:
● discrete power devices
● sensors
● low-volume semiconductor production.
9. TSK UF190R
The UF190R is an improved version of the UF190 platform.
Key advantages include:
● higher throughput
● lighter Z-axis design
● stable multi-site probing capability
These enhancements make the system suitable for discrete device testing and engineering applications.
10. TSK APM90A
The APM90A is another well-known TSK wafer probing system frequently used in older production lines and research facilities.
Key strengths include:
● simple mechanical architecture
● easy probe card setup
● reliable wafer handling
Because of its stability and relatively low operating cost, it remains common in secondary equipment markets.
Why TSK Wafer Probers Remain Industry Standards
Despite increasing competition from other probe system manufacturers, TSK wafer probers continue to dominate many wafer test environments.
Several factors explain their long-term popularity.
Proven mechanical stability
TSK probers are known for rigid stage structures and precise motion control systems.
High probing accuracy
Modern systems achieve micron-level positioning accuracy, which is essential for reliable electrical testing.
Strong compatibility with ATE systems
TSK probers integrate well with major test platforms from companies such as Advantest, Teradyne, and Keysight.
Large installed base
Because thousands of TSK probers are installed worldwide, spare parts, engineering expertise, and refurbishment services remain widely available.
Typical Applications of TSK Wafer Probers
TSK wafer probing systems are used in many semiconductor sectors.
Common applications include:
Logic semiconductor testing
Wafer sort testing for CPUs, ASICs, and digital ICs.
Memory device production
DRAM and NAND wafer electrical testing.
Power semiconductor manufacturing
Testing for IGBT, MOSFET, and SiC devices.
MEMS fabrication
Sensor and actuator device testing.
Analog and mixed-signal devices
High-precision parametric testing.
Key Factors When Choosing a TSK Wafer Prober
Selecting the right wafer prober depends on several engineering considerations.
Wafer size
Determine whether the system supports:
● 150 mm
● 200 mm
● 300 mm wafers
Throughput requirements
High-volume fabs require systems capable of multi-site probing and automated wafer handling.
Alignment accuracy
Probe alignment accuracy directly affects test yield and probe card lifetime.
Compatibility with testers
Ensure the prober integrates with existing ATE systems.
Spare parts availability
A strong spare parts supply chain helps reduce long-term downtime risk.
People Also Ask – TSK Wafer Prober
What is a TSK wafer prober used for?
A TSK wafer prober is used during the wafer sort stage of semiconductor manufacturing to electrically test individual dies on a wafer before the wafer is cut into chips. The prober precisely positions probe needles onto the contact pads of each die, allowing automated test equipment (ATE) to evaluate electrical performance, functionality, and yield. This process helps identify defective dies before packaging, improving manufacturing efficiency and reducing production costs.
Who manufactures TSK wafer probers?
TSK wafer probers are manufactured by Tokyo Seimitsu Co., Ltd., a Japanese semiconductor equipment company also known globally under the brand ACCRETECH. The company has been producing high-precision wafer probing systems for decades and is considered one of the leading suppliers of semiconductor test interface equipment.
What wafer sizes do TSK wafer probers support?
Most TSK wafer probers support a range of wafer sizes depending on the model. Common configurations include:
• 150 mm (6-inch) wafers
• 200 mm (8-inch) wafers
• 300 mm (12-inch) wafers
Older systems are typically designed for 6-inch or 8-inch wafers, while newer platforms such as the UF3000 series support 300 mm semiconductor manufacturing.
What is the difference between a wafer prober and a wafer tester?
A wafer prober and a wafer tester perform different but complementary roles in semiconductor testing.
The wafer prober is a precision mechanical system that physically aligns probe needles with the contact pads of semiconductor dies.
The tester (ATE) is the electronic system that sends signals to the device and measures electrical performance.
Together, they form a complete wafer test solution used in semiconductor fabs.
Conclusion
TSK wafer probers from Tokyo Seimitsu have been essential tools in semiconductor wafer testing for decades. From legacy platforms like the UF200 series to high-throughput systems such as the UF3000, these machines provide the precision and reliability required for modern semiconductor manufacturing.
The Top 10 TSK wafer probers highlighted in this guide represent some of the most widely used systems across global semiconductor fabs. Their continued presence in production lines reflects the durability, accuracy, and engineering quality of TSK probing technology.
For companies evaluating wafer probing equipment—whether for production expansion, equipment refurbishment, or spare parts sourcing—working with experienced technical suppliers is critical. Professional service providers can assist with equipment evaluation, refurbishment, installation, and long-term maintenance to ensure stable wafer testing performance.
With proper engineering support and maintenance, TSK wafer probers can continue delivering reliable performance for many years in semiconductor manufacturing environments.
