7 - year raw material system research

12 - year research on heat treatment wire drawing & rolling process

Hot silver treatment, cold rolling, and heat treatment achieve alloy material pre - treatment, ensuring excellent consistency, stability, and controllable TCR.

Yezhen can offer ultra - low TCR solutions for most products compared to industry standards.

15 - year research on welding technology

Automatic fluorine arc welding tech (Patent No.: ZL202120857626.X) enables 100+ HSR series specs, replacing British TT's OAR series products.

Automatic resistance welding tech (Patent No.: ZL202020620880.3) enables 100 - spec JSR series production, auto test & adjust, cuts costs, increases production.

The automatic laser welding tech (Patent No.: ZL201820907052.0) pioneered welding 0.1 - 0.4mm thick copper strips.

Yezhan used auto electron beam welding tech to expand thickness from 1 - 4mm to 0.3 - 4mm after 10+ years of tech & process accumulation.

Welding tech breakthroughs enabled resistors to cover all sizes, achieve international brand substitution domestically.

17 - year study on alloy resistor structure

Research on current distribution & resistor structure impacts on product temperature drift.

Resistor structure and pattern optimization.

Resistor structure & thermal simulation design.

17 - year alloy resistor experience.

7 year

raw material system research

12 year

research on heat treatment wire drawing & rolling process

15 year

research on welding technology

17 year

study on alloy resistor structure