From semiconductor lead frames to vacuum devices, from sputtering targets to precision custom components —

KINMACHI delivers stable, reliable conductive and thermal substrate materials for high-end manufacturing, backed by 4N-grade purity and full-form supply capability.

I. Product Introduction

Product Name: Oxygen Free Copper C10100 (OFE). C10100 offers excellent corrosion resistance along with outstanding thermal and electrical properties, making it a key foundational material for high-end applications in electronics, semiconductors, vacuum technology, and precision instruments.

Core Positioning: Backed by more than 20 years of process expertise and investment in advanced production equipment, we manufacture ultra-high-purity oxygen-free copper C10100 to meet the demands of the rapidly evolving electronics industry.

Process Advantages: Our pioneering oxygen-free melting process strictly controls oxygen content below 3 ppm to eliminate porosity, while keeping hydrogen content below 1 ppm to ensure material purity and reduce oxide formation. Combined with 10–50 zone-refining purification passes for ultimate impurity removal and PPB-level precision testing capability, we guarantee reliable delivery of high-conductivity oxygen-free copper.

II. Core Technical Specifications

KINMACHI enforces strict full-process control over the key physical and chemical parameters of C10100, ensuring every batch meets the stringent requirements of high-end electronics and semiconductor applications:

Item	Specification / Description	Remarks
Grade	Oxygen Free Copper C10100 (OFE)	Internationally recognized high-purity oxygen-free copper grade
Copper Content (Cu+Ag)	≥ 99.99% (4N grade)	Extremely high purity, minimal impurities
Oxygen Content	< 3 ppm	Oxygen-free melting technology prevents hydrogen embrittlement
Conductivity	≥ 102.5% IACS	Excellent electrical performance
Impurity Control	P, Bi, Sb, As, Fe, Pb, Ni, Sn, S, Zn all ≤ 0.0003%	Precise trace-element control
Grain Size	Uniform, fine grain; customizable	Meets diverse processing and forming requirements

III. Chemical composition

Item	Cu	Ag	As	Bi	Cd	Fe	Mn	Ni	O	P	Pb	S	Sb	Se	Sn	Te	Zn
Min	99.99
Max	–	0.0025	0.0005	0.0002	0.0001	0.001	0.0005	0.001	3ppm	0.0003	0.0005	0.0015	0.0004	0.0002	0.0002	0.0002	0.0001

IV. Product Forms & Applications

KINMACHI offers a full range of C10100 oxygen-free copper solutions, spanning the complete product spectrum from raw materials to finished parts, to meet diverse industrial application needs:

Sheet & Strip Suitable for semiconductor lead frames, electronic component heat sinks, and glass-to-metal seals — applications with stringent requirements for conductivity, thermal performance, and dimensional precision.	Tube, Rod & Wire Suitable for vacuum device structural parts, high-conductivity cables, and precision instrument components, combining high purity with excellent machinability.
Sputtering Target Suitable for semiconductor sputtering processes, optical coatings, cavity resonators, and superconductor substrates, meeting high-end coating purity requirements.	Custom Forms Copper granules, chip heat-dissipation heat pipes, and other custom-shaped parts, flexibly formed to customer structural and process requirements.

V. Why KINMACHI

20+ Years of Process Expertise Sustained investment in advanced production equipment and process R&D, with deep insight into the evolving material needs of the electronics industry.

Pioneering Oxygen-Free Melting Process Oxygen content strictly controlled below 3 ppm and hydrogen below 1 ppm, eliminating porosity and hydrogen-embrittlement risk at the source — industry-leading material purity.

10–50 Zone-Refining Purification Passes An ultimate impurity-removal process combined with PPB-level precision testing capability ensures stable delivery of high conductivity and other key performance metrics.

One-Stop Full-Form Supply Sheet & strip, tube/rod/wire, sputtering targets, and custom-shaped parts — one supplier covers every form across the value chain, reducing multi-vendor coordination costs.

Rapid Response & Customization Supports small-batch sampling and custom shaping, adapting to the fast-iteration needs of new product development.

Technical Consultation & Selection Support

If you are evaluating material solutions for lead frames, vacuum device structural components, sputtering targets, or other high-conductivity/thermal applications, please contact the KINMACHI technical team. We offer grade selection guidance, sample production, and bulk supply support.