Wafer Probe Systems

RF Wafer Probing

High Current Wafer Probing

UHP probes

HCP Probes

High Power Wafer Probing Solutions

High Power Device Tests

On-wafer characterization | Thin-wafer handling

MPI Definition

Electrical measurements of high power discrete devices like power transistors, power diodes, thyristors etc.. designed in vertical and/or lateral device orientation,  or even high power amplifiers.

Major Requirements

Measurement conditions required more than 500V (high voltage) and/or 1A (high current) in pulse or DC.

On-wafer characterization applications of high power devices face specific challenges such as:

  • Chuck to wafer backside contact resistance,
  • High current device pad burnout, and
  • Low leakage measurement at high voltage over temperature
  • High voltage arcing,
  • Thin-wafer handling and
  • Safety test environment

MPI Solutions

MPI’s High Power Probe Systems provide for accurate measurements of high power devices up to 3 kV (triaxial)/10 kV (coaxial) and 400 A (pulse) to include elevated temperatures of up to 300 °C. MPI’s gold plated high power thermal chucks, with evenly distributed vacuum holes located across the chuck, safely secure thin/warped wafers down to 50 µm.  These high power chucks also provide excellent backside wafer contact while achieving low contact resistance for vertical device RDS(on) measurements.

Multi contact High Current Probes (HCP) not only reduce the probe contact resistance but also avoid device pad burnout usually associated with single needle probes by distributing current. MPI’s high voltage probes (HVP) are design to withstand up to 10 kV for low leakage device breakdown measurements. The UHP probes are combining both capabilities and eliminating the need to change probes for high voltage and current applications.

To suppress high voltage measurement arching, MPI solutions include specially design trays for Fluorinert™ liquid or dedicated ant-arcing probe cards, which can be used uniquely even at higher temperature.

TAIKO wafer support is available on all MPI’s High Power Probe Systems, which are designed to integrate with various test instruments, such as Keithley or Keysight SMUs, and provide fast system setup for various device test conditions.

TS2500 is MPI’s 200 mm fully automatic probe system series, specifically developed to address High Power device testing at the production level. The system is designed for 24/7 production reliability and compatible with all MPI system accessories.

MPI high power probing solutions comes with safety systems and are tested for regulatory safety 3rd party certificates.

 *Fluorinert is a trademark of 3M Company, USA.


Field Application Engineer

Job Location: San Jose, CA

Job Duties:

1. Assist in developing HW and SW measurement methodologies/solutions for analytical wafer probe solutions with signal applications from DC to millimeter wave frequencies as well as Silicon Photonics (SiPH);
2. Collaborate with customers on their measurement challenges, and provide applications specific product training;
3. Provide pre- and post-sale support to AST, customers, service department, and the sales channel developing HW and SW measurement solutions for analytical wafer probe stations;
4. Define application-specific solutions based on customer-provided device data and facilitate both customer and divisional teams to successful results;
5. Perform product training seminars for customer and sales channels as well as participate in trade shows and technical seminars;
6. Make recommendations regarding product improvement, new products, and quality enhancement;
7. Author, document, publish, and present measurement solutions via Seminars, Applications Notes, Briefs, and White Papers;
8. Prepare, plan, and assist with customer product demonstrations that highlight value-based differentiation of AST product offerings;
9. Develop unique and individual customer presentations designed to professionally position the MPI brand in the North American market and deliver formal presentations to customers.

Job Requirements:

Master’s degree in Electrical Eng., Electronics Eng., Physics, or Photonics; Must possess 1 year of relevant work experience; Travel to customers’ sites in US and headquarters in Taiwan is required.

Send resume to: MPI America, Inc., 2360 Qume Drive, Suite C, San Jose, CA 95131, Attn: Janet Chiang