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COMPANY RESEARCH / Q

Qnity Electronics

Laird Eccosorb absorber cast into qubit IR filters

Published by FyncaResearch checked How we research

Where it fits in a quantum computer

Owns the Laird brand, whose Eccosorb CR castable epoxy and silicone absorbers and Eccosorb MF machinable absorbers are the kind of material labs cast into infrared filters for qubit lines: ETH Zurich’s 100-qubit-scale setup places a custom IR filter made of Eccosorb CR-124 before the mixing-chamber attenuator, and Japan’s 2025 roadmap describes IR filters as filled with Eccosorb. Qnity was spun off from DuPont on November 1, 2025, taking Laird with it; its 2025 net sales were $4.754 billion.

What the evidence establishes

Upstream enabler

Disclosed: Laird’s product pages list the Eccosorb CR and MF absorbers and call Laird a Qnity brand, and DuPont’s 2025 10-K places Laird in the electronics business spun off as Qnity.

Materials, isotopes, gases, substrates, equipment or foundry capacity behind quantum-computer components. This is not a component supplier role or an established quantum revenue stream.

Component roleLaird Eccosorb absorber cast into qubit IR filters
EvidenceDisclosed: Laird’s product pages list the Eccosorb CR and MF absorbers and call Laird a Qnity brand, and DuPont’s 2025 10-K places Laird in the electronics business spun off as Qnity.
How we knowDisclosed The company’s own filing, release, annual report, product page or investor record describes the quantum-computing role. Where customers are unnamed, the listing says so.
Primary sourceQnity Electronics — supporting disclosure
Company or official disclosure; vendor claims are attributed to their source.
Checked. This is the research review date, not the source publication or quote time.

Keep in perspective

Qnity sells the absorber material, not finished filters, and neither Qnity nor Laird mentions quantum computing; the quantum use is documented by research groups, and the material is a negligible part of Qnity’s sales.

Diversified business exposure. This describes the breadth or role of the business; it is not an investment rating. A quantum-computing product, design-in or partnership does not by itself establish material quantum revenue, market share, or future returns.

Connections to the assembly

These links explain the technology relationship. The model is illustrative and does not represent an actual manufacturer’s bill of materials.

Filters & IR absorbers

Low-pass and band-pass filters and infrared-absorbing filters that block stray high-frequency radiation, which would otherwise break the qubits’ superconducting pairs.

Scope of the company links: Low-pass, band-pass and infrared filters keep stray radiation and out-of-band noise off the qubits. Amphenol’s XMA sells cryogenic IR filters (the AIST roadmap says IR filters, once home-made by researchers, are now sold as products by XMA Amphenol and Kawashima Seisakusho), Huber+Suhner builds IR filters into its multicoax system, and QuantumCTek sells cryogenic filters with its cable assemblies. Qnity is mapped as an upstream material supplier: its Laird Eccosorb absorbers are cast into IR filters, as in ETH Zurich’s Eccosorb CR-124 filter. Conventional low- and high-pass filters come mostly from private Mini-Circuits and RLC Electronics; the roadmap also lists a ‘K&L’ filter maker, which we did not tie to Dover. Bluefors, Quantum Microwave and Delft Circuits sell private IR-filter products.

Related research

Companies with overlapping sector exposure. Their products and evidence may differ; this is not a list of equivalent investments.

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