Testbourne Ltd.

Unit C, The Loddon Centre, Wade Road, RG24 8FL Basingstoke, Hampshire
United Kingdom of Great Britain and Northern Ireland
Telephone +44 1256 467055
Fax +44 1256 362955


Hall map

glasstec 2016 hall map (Hall 11): stand H61

Fairground map

glasstec 2016 fairground map: Hall 11


Mike Dalton

Lager/Material, Logistik, Transport

Unit C, The Loddon Centre, Wade Road
RG248FL Basingstoke, United Kingdom of Great Britain and Northern Ireland




Dr. Peter van Hoeck

Lager/Material, Logistik, Transport

Unit C, The Loddon Centre
RG24 8FL Basingstoke, Hampshire, United Kingdom of Great Britain and Northern Ireland


+44 1256 842929


Chris Mihill

Geschäfts- /Unternehmensleitung

Unit C, The Loddon Centre
RG24 8FL Basingstoke, Hampshire, United Kingdom of Great Britain and Northern Ireland

+44 1256 467055

+44 1256 842929


Our range of products

Product categories

  • 01  Glass production/Production Technology
  • 01.14  Photovoltaic production/Production Technologies
  • 01.14.01  Wafer production
  •  Metallisation
  • 02  Glass processing and finishing
  • 02.06  Coating technology
  • 02.06.08  Sputtering targets for flat glass coating

Sputtering targets for flat glass coating

Our products

Product category: Metallisation

Architectural, Automotive Glass & WEB Coating

Testbourne Ltd is a world-wide supplier of sputtering targets for the glass coating industry. Testbourne is involved with our customers in the development and production of coating materials for architectural glass, automotive glass, photovoltaics, mirrors and other coatings.
Production methods used are casting, powder metallurgy, spraying and bonding. Testbourne its product portfolio includes all the key pure metals, as well as popular alloys and ceramics.

Our sputtering targets are produced in different shapes (planar and rotatable) with sizes – up to 13.2 ft / 4 metres in length.

Applications for our materials are:

Architectural Glass (low-e, solar control)
Automotive Glass
Anti-reflective and Antistatic Coatings (ARAS)

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Product category: Sputtering targets for flat glass coating

Target Bonding Service

Sputtering targets can be simply clamped to the sputter source cathode inside the sputter depositing system. However, this procedure can prove costly due to cracking, warping or other damage to the target in use caused by inadequate cooling. Wherever possible, it is good practice to bond the sputter target to a strong, compatible backing plate.

Target Bonding is a critical process and the exact fabricating method employed can vary depending on the choice of the sputtering target material. A properly bonded sputtering target will normally give a longer working life than a non-bonded target, may enable the use of a higher power input to achieve faster sputtering rates and will enable thin film process parameters to be consistently repeated.

Shear stresses that develop between the target and backing plate, due to heating during sputtering, can be a cause of bonding failure when the backing plate and sputtering materials do not have compatible coefficients of thermal expansion. Depending on the dimensional tolerances allowed, the bond thickness can be adjusted to help compensate for these stresses.

As a complementary service to our Sputtering Target business, Testbourne Ltd proved target bonding by various metallic or silver epoxy techniques.

Indium-based Metallic Bonding
All Indium based metallic bonded targets include a sputtered metal intermediate bonding layer on the "bonded" side of the target, which acts as a barrier layer protecting the target material integrity from diffusion of the hot primary bonding metal alloy. The metal bonding technology offers excellent thermal and electrical conductivity and is compatible with either DC or RF power supplies. A properly bonded target will stay adhered to the backing plate providing there is a continuous supply of the sufficient cool water and the sputtering source cathode is not powered.

Metallic bonding can withstand temperatures up to 156 °C.

Elastomer Bonding
Elastomer bonding is a proprietary bonding method that was initially developed for bonding materials that were impossible to effectively bond with metals. Interest in this bonding technique has grown considerably in the last few years and now accounts for a high percentage of our business. As indium prices have increased, Elastomer bonding has become a cost effective alternative, especially where both the target and backing plate are consumable and indium reclaim is unrealistic.

The major advantages of Elastomer bonding are its low cure temperature (reducing internal bond stresses from thermal miss match) and high operation temperature (250 °C). Elastomer bonding has permitted new materials to be bonded effectively by increasing line yield from stress fractures. Targets have also been scaled to larger dimensions based on the Elastomer bonding technology. Multiple piece targets in excess of 120" x 110" and single piece targets of 110" x 100" have been bonded while maintaining flatness tolerances.

The Elastomer bonding has less than 1% total mass change at 250 °C for 24hrs at 1x10-7 Torr. The thermal conductivity of the bond is 54W/mK at 0 °C compared to Indium at 83.7W/mK, however the Elastomer bond will operate at 250 °C versus indium which melts at 156 °C.

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About us

Company details

Testbourne Ltd is a professional high technology / materials company, supplying high purity materials, single crystals & wafers, evaporation sources, ceramic to metal components, thin film measuring and control, sample preparation and industrial microwave equipment. Established in 1978 we have over 36 years of experience with metals, alloys and compounds, in a variety of market areas including glass coatings, electronics, energy, defence, semiconductors, decorative & hard wearing coating industries, government research establishments and universities.

The Testbourne name is synonymous with Service! Our company’s objective is to provide a fast and efficient service, with full technical support to all our customers worldwide.

Our production caters for small R&D requirements to large scale mass production quantities. By working closely with our customers from the initial R&D stage right through to on-line production, we can be sure to maintain a high quality product.

We look forward to working with you.

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Company data

Target groups

Solar Glass/Technical Glass