Precision Meets Power

DELO has introduced a new adhesive for optoelectronic applications. DELO DUALBOND OB786 is particularly suited for fixing components within seconds while ensuring precision and high strength.

After an irradiation time of less than one second, the build-up of adhesion is already significant; after five seconds, the compression shear strength on glass even reaches 18 MPa. The adhesive also ensures good adhesion to other typical optoelectronic substrates such as aluminum, FR4, PPS, or LCP.

The milky epoxy resin with medium viscosity cures under UV light at a wavelength of 365 nm in layers of up to 1.5 mm thickness. In the case of thicker adhesive layers or shadowed areas, which are not reached by the light due to the component’s geometry, the dual-curing adhesive will be exposed to heat for full polymerization. This process typically takes places at + 80 °C for 50 minutes.

The product features reduced outgassing and shrinkage, both being important characteristics for optical precision. Its low coefficient of thermal expansion (CTE), matching both electronic components and PCBs (printed circuit boards), ensures a high optical quality, even in case of temperature fluctuations.

Modified for Special Optical Requirements

DELO DUALBOND OB786 is available in additional modified versions, for example, in black to shield the ray path or optical elements and absorb scattered light. Another option is the white version which provides increased reflection and leads to a higher light yield. Furthermore, this product has smaller-sized fillers, making the adhesive suitable for even more miniaturized applications.


”Being able to introduce Brazil to the infinite opportunities of a solar industry is a privilege for J.v.G. Thoma GmbH, and one that we are extremely grateful for. At the same time, this placed the ball squarely in our court, and the pressure to get the ball rolling quickly was high. Now that the lengthy initial formalities are out of the way, we can focus on making this project a success.“

The first DESERT solar module production in BRAZIL! Lets go ....
J.v.G. Thoma GmbH is delivering a DESERT turnkey production line to Brazil, the first of its kind and hopefully the first in many breakthroughs to leave the factory floor on their way to the largest country in South America. With a capacity of 30 MW, this is a small semi-automatic DESERT production line, but still a flagship in terms of DESERT solar module production and electricity generation in the country, now fully functional and ready to start with operation.

The machinery consists of DESERT production machines for high-efficiency DESERT solar modules built specifically for extreme hot climate, such as can be seen in deserts or in tropical areas. Made solely in Germany and built using the latest in DESERT and TROPIC module production, the systems inlcudes all cutting-edge technology.

Certified DESERT solar modules, DESERT containers, DESERT power plants and DESERT manufacturing machinery built using pioneering DESERT and TROPICS technology are now fully set up, and ready to perform. But powering on the machinery has been a long time coming. Up until recently, this advanced piece of equipment had been waiting for clearance at a port in Brazil. Now that the formalities have been dealt with, both J.v.G. Thoma and its customer in Brazil can get production under way.

J.v.G. Thoma GmbH is a company whose vision has always been to harness the infinite power of the sun and convert it into an inexhaustible supply of energy. But a vision such as this requires global reach, and this project has opened new doors. Brazil is not only a gateway to South American cooperation, but also the launchpad to international reach and expansion.

Following the delivery of this initial order, J.v.G. Thoma GmbH will be looking forward to an ongoing collaboration with the Brazilian company. From setup and initial training to setting the scene for a ramp up, J.v.G. Thoma will be there to provide expertise and assistance. Moreover, the company will be jointly responsible, along with the client, for the successful integration of the DESERT solar module factory.

In the future, bigger DESERT power plants will be set up on Brazilian soil, and together with existing turnkey production systems, they intend to take up a large share of the products and assets this sector will possess locally. J.v.G. Thoma plans to build up a local network of sales agents that can extend a premium offering to neighbouring countries in South America. Eventually, the company hopes to be able to expand its customer base to clients in North America.

Hans Thoma, general manager from the Thoma-group, is eager to acquire a substantial market share in Brazil, a growing country with tremendous potential for solar energy output. Having complied with local official procedures (Inmetro, TÜV, Fraunhofer CSP) and cleared the way for future business collaboration, he expresses his hope that the solar industry will henceforth expand quickly.

”Being able to introduce Brazil to the infinite opportunities of a solar industry is a privilege for J.v.G. Thoma GmbH, and one that we are extremely grateful for. At the same time, this placed the ball squarely in our court, and the pressure to get the ball rolling quickly was high. Now that the lengthy initial formalities are out of the way, we can focus on making this project a success.“

The first DESERT solar module production in BRAZIL! Let
Source: DELO Industrie Klebstoffe GmbH & Co. KGaA