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VMI is dedicated to quality. Statistical methods are utilized for product design, verification and production. 

VMI operates on the principle that quality is cost effective and essential.

Our Quality system is ISO9001:2015 Certified.

VMI is incorporated in the state of California as a closely held corporation. The principal stockholders are Dennis J. Kemp, Kenneth E. Haag, and John K. Yakura.

 Voltage Multipliers, Inc. began operations in November of 1980. Initially designing and producing voltage multipliers, our product line has expanded to include diodes, high voltage power supplies and rectifier assemblies.


All operations are located in Visalia, California. Our facilities have grown to 34,000 sq. ft. of manufacturing area with 10,000 sq. ft. of office area.

VMI's sales organization includes world-wide representation as well as direct factory support. Sales information and product inquiries may be directed through your local sales representative or directly to our facility
VMI stripe

All silicon wafers are doped, diffused, and evaporated in our Visalia, California facility.

Metal Evaporation


All device assembly, passivation, and encapsulation are performed in-house.

Furnace Diffusion  

Complete in-house diode testing is performed on all VMI diodes for PIV, Vf, Ir, and Trr.

Last revised: 21 May 2014