Custom Transformers & Inductors for Semiconductor & Electronics Manufacturing

Semiconductor equipment doesn’t tolerate “close enough.” A magnetic component that drifts out of spec over temperature, fails qualification under 24/7 load, or arrives twelve weeks late can stall a design release, push out shipments, and put your fab customer’s yield numbers on the line. That’s why semiconductor equipment OEMs come to Custom Coils USA. We’ve spent 50+ years engineering custom magnetic components that hit exact specifications — and stay in spec across the operating life of the equipment.
Catalog parts get you close. They don’t get you to a qualified design. Our custom ferrite transformers, SMPS transformers, RF coil assemblies, SMD inductors, and RF matching network inductors are engineered around your operating frequency, power rating, isolation requirement, thermal envelope, and form-factor constraints — not pulled from a standard bin.

Why Equipment Manufacturers Choose Us

• 50+ years of magnetics engineering across every semiconductor generation
• 1000+ equipment manufacturers worldwide rely on our precision components
• 4–8 week prototypes from specification to qualification-ready hardware
• USA manufactured with ISO 9001 certification and full traceability

Custom Magnetic Components We Engineer for Semiconductor Applications

We design custom transformers for semiconductor equipment and custom inductors for semiconductor applications that meet the precision, repeatability, and thermal performance fab-grade tools require. Every component is wound, tested, and documented to your specification.

Ferrite Transformers

Operating range: 20 kHz–1+ MHz. Ferrite cores are the workhorse of high-frequency power conversion because their high electrical resistivity keeps eddy-current losses low where laminated steel cores would overheat. We select the right ferrite material (MnZn, NiZn) and core geometry for your frequency, flux density, and temperature-rise targets.

Switch Mode Power Supply (SMPS) Transformers

Multi-rail isolated DC conversion: +12 V, +5 V, +3.3 V — and any custom rail set — from a single transformer. SMPS transformers, also called switching power supply transformers, are engineered around your topology (flyback, forward, push-pull, half- or full-bridge, LLC). We design the winding stack, leakage inductance, and turns ratios so your supply hits regulation, efficiency, and EMI targets without a redesign cycle.

RF Coil Assemblies

Used inside plasma tools, RF generators, and signal-processing chains where coil Q, thermal stability, and dimensional repeatability all matter. We’ve been winding RF coils for plasma equipment for decades and we understand what survives in the field versus what comes back as a warranty return.

Surface Mount (SMD) Inductors

Also called surface mount inductors. Available in very small packages, our SMD inductors operate cleanly from 100 kHz to 1+ MHz. They reduce board real estate, integrate with standard pick-and-place assembly, and free up routing density on the high-component-count boards used in test, inspection, and process-control equipment.

RF Matching Network Inductors

Engineered for impedance matching in plasma etch, deposition, and process tools at standard ISM frequencies. Each inductor is delivered with measured inductance and self-resonant frequency data, so your matching network tunes the first time and stays tuned through production.

Key Applications

• Semiconductor Processing: Ion implantation, plasma etching, CVD, PVD
• PCB & Electronics Manufacturing: High-density PCB assembly, automated optical inspection
• High-Frequency RF Systems: Plasma generators, RF signal networks, impedance matching
• Test & Measurement Equipment: ATE, wafer probing systems, burn-in testers

Frequently Asked Questions

Q1: Why do I need a custom transformer for semiconductor equipment instead of a catalog part?

Catalog high-frequency magnetics are built to a generic specification. Semiconductor equipment is not generic. Process tolerances, isolation classes, thermal envelopes, and mechanical form factors are specific to each tool platform. A custom-engineered component lets you hit your power, regulation, and EMI targets cleanly — and avoids the qualification risk and field-reliability surprises that come with an “almost right” part.

Q2: What’s the difference between SMPS and ferrite transformers?


They overlap most SMPS transformers are wound on ferrite cores. The distinction is usage: a ferrite power transformer typically describes a single-output, high-power conversion component, while an SMPS transformer is engineered around a specific switching topology (flyback, forward, LLC, etc.) and often delivers multiple regulated outputs from one unit.

Q3: Why are SMD inductors better for semiconductor equipment electronics?

Density, assembly cost, and parasitics. SMD inductors free up board real estate, integrate with automated pick-and-place lines, and reduce parasitic loop area compared with leaded equivalents — which matters on high-frequency control, sense, and signal boards.

Q4: How do RF matching network inductors improve plasma systems?


Plasma uniformity and process repeatability are sensitive to impedance match. A pre-characterized matching inductor  with measured inductance and SRF  lets your matching network converge quickly and reproducibly, reducing extended tuning during integration and minimizing process drift over the tool’s lifetime.

Q5: What are your lead times for prototype transformers?

4–8 weeks from finalized specification to qualification-ready prototype. Engaging us early in your design cycle often shortens that further.