Heraeus announces three new polymer-based heater pastes
West Conshohocken, PA – The Thick Film Division of Heraeus Precious Metals, a precious metals and technology company, has announced the introduction of three new polymer-based heater pastes that cure at temperatures lower than 300°C and adhere well to a variety of substrates. The system consists of a dielectric paste, resistor paste, and epoxy-based silver conductor pastes.
The LTD5301 dielectric paste can be applied in three layers using a 230 mesh screen. The layers can be co-cured: Print Layer 1 cures at 150°C for 10-minutes, Print Layer 2 cures at 150°C for 10-minutes and Print Layer 3 cures at 250°C for 30-minutes. Target thickness is 40µm. This polymer insulator yields a chemically inert film that will not react with circuit components.
The TR43.08 resistor paste is recommended for screen printing on 280-325 mesh screen. This low-ohm polymer resistor (70-90 ohms/sq.) cures at 200°C-to-250°C peak temperature for 60-minutes and dries in 10-minutes at 150°C. Target cured thickness is 23-27 µm. Other resistor values can be developed depending on specific requirements.
The LTC3001 epoxy-based silver conductor paste is screen-printable using a 230-325 mesh screen. It offers multiple curing times: 150°C for 30-minutes, 200°C for 15-minutes and 350°C for 10 minutes. Cure thickness is 15-20 µm. The paste cures to a film that has low resistivity and excellent solvent resistance. Multiple layers will give a greater overall thickness and increase the leach resistance.
“The polymer heater paste system was developed to provide a low-temperature processing alternative for designing and manufacturing heater circuits,” said Mel Mehta, Sales and Marketing Manager at Heraeus. “The system’s low temperature processing allows a variety of substrates to be used.”
These products will be highlighted at Heraeus’ booth (#204) during the IMAPS 2012 conference taking place September 9-13 in San Diego, Calif.
Heraeus Precious Metals North America Conshohocken LLC, Thick Film Division, is a worldwide supplier of thick film pastes, LTCC materials and precious metal powders to the hybrid microelectronics industry. The Thick Film Division offers products for thermal management applications, including LED packaging, power modules, and electronic heating units.
Heraeus, the precious metals and technology group headquartered in Hanau, Germany, is a global, private company with over 155 years of tradition. Our businesses include precious metals, materials and technologies; sensors; biomaterials, medical products and dental products; quartz glass; and specialty light sources. With product revenues of € 2.6 billion and precious metal trading revenues of € 13.6 billion, as well as more than 12,300 employees in over 110 subsidiaries worldwide, Heraeus holds a leading position in its global markets.
Mel Mehta, Sales and Marketing Manager