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DuPont™ GreenTape™ 9K7 low temperature co-fired ceramic (LTCC) materials

GreenTape™ low temperature co-fired ceramic (LTCC) materials

DuPont™ GreenTape™ 9K7 is a lead free* low loss glass ceramic dielectric tape for high frequency applications - up to 100 gigahertz (GHz) and beyond - that includes compatible gold and silver conductors, plus co-fired embedded resistors.  For advanced high-frequency, microwave, and millimetre wave electronic circuit applications within the aerospace, automotive, military, consumer electronics, and telecommunications industries.

GreenTape™ 9K7 delivers: 

  • High reliability via hermetic packaging
  • Repeatability in processing
  • Low loss at high frequency
  • Stable dielectric constant, shrinkage, and surface roughness following a wide variety of downstream processing conditions.
  • Unique benefits for system integrators/OEMs 
  • Unique benefits for fabricators 

These properties make GreenTape™ 9K7 a unique solution for leading edge applications requiring RF and microwave frequencies, such as bluetooth, automotive safety radar systems, and transceivers.

All components of the DuPont™ GreenTape™ 9K7 LTCC system are compatible, to facilitate their introduction into the manufacturing process.

For System Integrators and OEMs DuPont™ GreenTape™ 9K7 is ideal for electronic system designs which need to deliver a high density, low loss, cost effective interconnect and packaging solution that performs with exceptionally high reliability. 

Benefits versus not-in-kind organic laminates such as liquid crystal polymer, include:

  • Higher routing density
  • Reduction in footprint of approximately 20%
  • Embedded resistor capability
  • Better hermeticity
  • Up to 80% better TCE match with gallium arsenide and silicon die.


For Fabricators More robust in processing, GreenTape™ 9K7 offers a stable dielectric constant even when refired, which translates into consistently higher yields for final circuits. 

Processing advantages versus other merchant tape systems include:

  • Approximately 25% lower loss
  • A 10 – 15% increase in mechanical strength
  • Significantly improved re-fire (6X) stability of dielectric constant and surface roughness



* “Lead free” as used herein means that lead is not an intentional ingredient in and is not intentionally added to the referenced products.  Trace amounts however may be present.

Please note: Not all products are available in all regions. Contact us to discuss your specific needs.