Sumitomo Electric Industries, Ltd.

Sumitomo Electric develops and manufactures specialized flexible PCBs, including fluororesin-based FPCs, by applying core technologies across the group and utilizing a fully integrated in-house production system. This article introduces the characteristics and capabilities of the flexible PCBs they offer.

Features of Flexible PCBs by Sumitomo Electric
Key Features of Flexible PCBs

High-Frequency FPCs with Low Transmission Loss, Made from Fluororesin

Sumitomo Electric manufactures high-frequency FPCs that offer excellent flexibility and low transmission loss. By using fluororesin as the dielectric material, these FPCs are optimized for millimeter-wave bands and automotive radar frequencies, making them highly suitable for next-generation 5G communications and related applications.

Thin, Fine-Pitch, and Excellent Antenna Performance

Fluororesin-based FPCs can be manufactured to be extremely thin and support fine-pitch layouts. When configured as a 2×2 antenna array, they can deliver 1.5 times the antenna performance compared to liquid crystal polymer-based alternatives.

Expertise in Specialized FPC Development

Sumitomo Electric Printed Circuits serves as the group’s gateway for flexible circuit board solutions. The company specializes in the development of advanced FPCs, including high-bendability FPCs, form-retaining FPCs, and high-speed transmission FPCs, as well as double-sided fine-pitch FPCs.

Specifications of Sumitomo Electric’s FPCs

Why Choose Sumitomo Electric?

Core technology for fluoropolymer FPC's and special FCP's.

Sumitomo Electric applies its core technologies to develop fluororesin-based FPCs that achieve low transmission loss even in millimeter-wave frequencies. Their strength lies in a fully integrated system, from material development to manufacturing, allowing for flexible and specialized FPC solutions.

This website introduces manufacturers with strong capabilities in flexible PCB production. Use it as a guide to help you select the best supplier for your needs.

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Responsiveness of Sumitomo Electric

Total In-House Production, Starting from Raw Materials

Sumitomo Electric is capable of end-to-end production of flexible PCBs, including the development of base materials such as insulating adhesives, sheet processing, and final product application. Their strict quality control enables them to meet the high cleanliness standards required in HDD applications.

FPC Quality at Sumitomo Electric

Uncompromising Quality Built on Sumitomo Group’s R&D

Sumitomo Electric leverages the group’s extensive R&D assets—ranging from circuit patterning, high-density packaging, and polymer material development—to ensure high product quality. Their analytical and evaluation technologies are also applied to material development and product design.

Sumitomo Electric's Track Record

Proven Performance in Advanced Applications

• RF module connections: Smartphones, routers, PCs, base station equipment
• External terminal connections: PCs, data center equipment, base station equipment
• FPC antennas: Base station devices, automotive radar systems

Extensive Adoption of High-Precision FPCs

Used in: Automotive, mobile devices, wearables, high-frequency antennas, transmission/reception modules, robotics, actuators, speaker diaphragms, camera image stabilization modules, medical devices, HDDs, DVDs

Company Information – Sumitomo Electric

Address	4-5-33 Kitahama, Chuo-ku, Osaka, Japan (Sumitomo Building)
Business Hours	Not listed on the official website
Phone (Japan domestic only)	06-6220-4141
Official Website	https://sumitomoelectric.com/jp/