Fugitive Carbon Tape
Summary
C12 Fugitive Carbon Tapes are optimized for creating embedded cavities, microchannels, and MEM's structures in Low Temperature Co-fired Ceramic (LTCC) multilayer devices and other laminated components. C12 Fugitive Carbon Tapes are also very effective for creating meso-scale features in High Temperature Co-fired Ceramics (HTCC) and other ceramic composites.
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Description
C12 thermally Fugitive Carbon Tapes are sold as thin flexible sheets made with specially processed, ultrapure carbon that leaves no residue after debinding and sintering. C12 thermally Fugitive Carbon Tapes can be used to form embedded channels, cavities, and MEMs structures in LTCC and HTCC multilayer substrates. C12 Fugitive Carbon Tapes can be laser cut to high precision, and embedded before the multilayer lamination process. C12 Fugitive Carbon Tape inserts provide support, and create an open unfilled space after the debinding and sintering process. C12 Fugitive Carbon Tapes have the highest solids loading available, which results in very low sagging and crack-free multilayer ceramic structures. Other thermally fugitive pastes and materials with lower carbon loading and excessive binder content often cause stress, warping, and damage to delicate structures during firing. C12 Fugitive Carbon Tapes can be a cost-effective alternative to using removable inserts such as platinum or latex to create structural features. C12 Fugitive Carbon Tapes do not smudge, and are easily punched or cut into complex shapes with simple tools or with low-power laser trimmers. C12 Fugitive Carbon Tapes are designed to be compatible with all major commercial LTCC tape and screen printable systems.
Ultrapure C12 Fugitive Carbon Tapes are engineered to burn out cleanly in air atmospheres. C12 Fugitive Carbon Tapes begin to rapidly oxidize at 600C, just before pore closure in the LTCC glass ceramic matrix, leaving behind well-defined features such as cavities and channels. C12 Fugitive Carbon Tapes create precise, stress-free structures, unlike conventional fugitive materials such as waxes and polymers, which often leave residue and result in stress related deformation.
Ultrapure C12 Fugitive Carbon Tapes are engineered to burn out cleanly in air atmospheres. C12 Fugitive Carbon Tapes begin to rapidly oxidize at 600C, just before pore closure in the LTCC glass ceramic matrix, leaving behind well-defined features such as cavities and channels. C12 Fugitive Carbon Tapes create precise, stress-free structures, unlike conventional fugitive materials such as waxes and polymers, which often leave residue and result in stress related deformation.
Advantages of C12 Fugitive Carbon Tape
♦ Forms in-situ, buried channels, cavities, and MEMs structures in LTCC and other multilayer substrates.♦ Prevents deformation during high pressure lamination of multilayer structures.♦ Prevents slumping and cracking during firing.♦ Contains high purity carbon which burns out cleanly in air atmospheres - gas phase directly sublimates 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.
C12 Fugitive Carbon Tapes begin rapid burn-out (oxidation) in air just before pore closure begins in LTCC ceramic (DP951 Green Tape).
Cross section showing precise channels formed in LTCC substrate with C12 Fugitive Carbon Tapes.
Design for a ceramic (LTCC) multilayer with suspended bridge for flow sensing. Channels and bridges are created with thermally fugitive C12 Fugitive Carbon Tapes.
X-ray view of multilayer ceramic (Al2O3) substrate with embedded cooling channels and ports formed using C12 thermally Fugitive Carbon Tape inserts.
Recommended firing schedule for creating defect-free microchannels and buried cavities in LTCC multilayers.
Close-up showing buried micro-channels (approx. 130um) formed in LTCC laminate with C12 thermally Fugitive Carbon Tape.