C12 Advanced Technologies, LLC

High Purity, LTCC Carbon Paste


"Thermally fugitive" carbon pastes for fabricating buried cavities, microchannels, and MEM's structures in Low Temperature Co-fired Ceramic (LTCC) multilayer devices and other laminated components

Description

 

C12 Advanced Technologies LTCC Carbon Pastes are used to form in-situ microchannels, buried cavities, and MEMs structures in Low Temperature Co-fired Ceramic (LTCC) multilayer devices and other laminated components.  LTCC Carbon Pastes have been extensively tested, and are compatible with all major commercial LTCC tape and screen printable systems.  LTCC Carbon Paste is a screen printable paste made of specially formulated, high purity carbon that results in low shrinkage and excellent leveling properties during drying.  Thermally fugitive LTCC Carbon Pastes burn out cleanly in air atmospheres, and begin to rapidly sublimate at 600 deg. C, leaving behind well-defined, low distortion features including buried cavities and microchannels.

Features:

 

  • Forms in-situ channels and buried cavities in LTCC multilayers and other laminated components.

 

  • Prevents deformation during high pressure lamination of multilayer structures.

 

  • Prevents slumping during firing.

 

  • Contains high purity carbon which burns out cleanly in air atmospheres – sublimates directly without causing stress on green parts.

 

  • Cost effective substitute for removable inserts (e.g. latex, platinum, etc.)

 

  • Does not require complex lamination and firing cycles that are necessary when using other fugitive materials such as wax or polymeric materials.

 

  • Compatible with all major commercial LTCC tape and screen printable systems.

 

 

Applications include forming buried channels, cavities and ports in:

 

  • Low Temperature Co-fired Ceramics (LTCC).

 

  • Solid Oxide Fuel Cell (SOFC) membranes.

 

  • Ceramic MEM's.

 

  • Microfluidic devices with channels for gasses and fluids.

 

  • Suspended structures, (accelerometers, pumps, flow sensors, air core inductors, etc.)

 

  • Microreactors and microcombustors.

 

  • Laminated Object Manufacturing (LOM) and rapid prototyping.

 

  • Thermally fugitive masking materials.






Cross section of embossed channel formed by laminating LTCC tapes around screen printed LTCC Carbon Paste as described by K. Peterson, et al., in Ref. 2. (Photo reproduced with permission of International Microelectronics And Packaging Society, Washington DC, CICMT 2005).
(a) Front of mesovalve manifold with standard connectors. (b) Back of manifold showing contoured channels formed by LTCC Carbon Paste lamination as described by K. Peterson, et al., in Ref. 2. (Photo reproduced with permission of International Microelectronics And Packaging Society, Washington DC, CICMT 2005).
Air core inductors fabricated using LTCC Carbon Paste with LTCC tape and screen printed conductors as described by K. Peterson, et al., in Ref. 2. (Photo reproduced with permission of International Microelectronics And Packaging Society, Washington DC, CICMT 2005).