Rosel Produces Pilot Batch of Flexible Rigid Boards for Spacecraft Electronics

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Rostec State Corporation's Rosel Holding has manufactured an experimental batch of flexibly rigid book-shaped boards designed to transmit high-frequency radio signals. The products are used in devices where fast and reliable signal transmission with minimal losses and distortions is important — in satellite and radar systems, telecommunications, and wireless communication systems. The prototype of the product is presented at the Rosel stand as part of the ExpoElectronica-2026 exhibition.

A book design is a method of arranging electronic components in which several printed circuit boards (subunits) are connected to each other and to a supporting structure using pivots. This architecture provides support for the boards at high vibration, removes heat from them, and reduces the size and weight of the entire product. This is important for on-board spacecraft devices, where minimization of the mass and dimensional characteristics of the equipment is required.

The combination of rigid and flexible elements ensures transmission of electrical signals between electronic components of the equipment and allows the creation of three-dimensional structures that cannot be implemented on traditional rigid products.

For the flexible part of the boards, polyimide is used, which has temperature resistance and can withstand soldering temperatures above 260 °C. The rigid part is made of fiberglass, which is characterized by mechanical strength, durability, and low moisture absorption (less than 0.2%). This allows the boards to be used in an aggressive environment without compromising performance.

The product was developed by the Electropribor production association (part of the Automatika concern of the Rosel holding), an enterprise for the manufacture and supply of telecommunications and special-purpose communications equipment.

"The development and manufacture of printed circuit boards, characterized by high precision and structural complexity, is traditionally the strongest competence of Electropribor software. The use of our boards is especially relevant when assembling compact electronic devices due to the book—like design and flexible sections that can fold or bend to accommodate in narrow spaces," said Alexey Troshin, General Director of Electropribor.

The international exhibition ExpoElectronica-2026 will be held in Moscow on April 14–16, 2026.

Click here to learn more about the Rostec State Corporation.

Event

ExpoElectronica 2026