Gold · 4N — Electronic brazing and technical gold leaf

Gold Sheet and Foil

Pure gold sheet and foil (Au ≥ 99.99% — 4N) cold-rolled from 0.025 mm thick. Used in brazing of high-vacuum joints, contact plating, cryogenic thermal shielding and CF flange sealing washers. Cut to size with certificates.

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Au >= 99.99% · Thicknesses 0.025-2 mm · Tolerances ±5%
Fully annealed: maximum ductility without work hardening
Foil for sealing gaskets in CF-16 to CF-200 flanges (UHV)
Absolute resistance to oxidation and sulphidation
Certificates with composition analysis by X-ray fluorescence

Specifications

Dimensions and standards

Gold Sheet and Foil — Specifications
Thickness	0.025–2 mm
Standard width	up to 100 mm
Standard length	up to 300 mm
Purity	Au ≥ 99.99% (4N)
Process	Cold rolled + annealed
Cutting	Shearing, punching, custom laser cutting

RoHS 2
REACH

Industrial uses

Applications

Washers and seals for CF flanges in ultra-high-vacuum (UHV) systems
Brazing of ceramic-to-metal joints in vacuum devices and MEMS
Coating of high-reliability electrical contacts (reflow)
Thermal and radiative shielding in cryostats and satellites
Au-Si eutectic bonding contacts (363 °C) for semiconductor packaging

Same material

Wire

Ø 0.01–2 mm · 4N

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Anodes

For electroplating and PVD

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Discs / Targets

Sputtering PVD · 4N

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Tell us dimensions, grade and quantity. Technical response in less than 24 h.

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Gold Sheet and Foil

Dimensions and standards

Applications

Other formats of Gold

Wire

Anodes

Discs / Targets

Request your quote for Gold Sheet and Foil