High temperature co-fired ceramics

Updated May 25, 2010

Click here to go to our co-fired ceramics page

Click here to go to low-temperature co-fired ceramics (LTCC) page

New for March 2010! This page was split off of the co-fired ceramics page.

High temperature co-fired ceramics differ from their low-temperature cousins, because their firing temperature of greater than 1500C restricts the types of metalizations that can be co-fired. If gold or silver were co-fired at 1500C, they would melt and run off the ceramic. Thus only "refractory" metals are co-fired above 1000C, such as tungsten, manganese, and molybdenum. These metals all have one thing in common: their resistivity is high. This means than metal losses in HTCC circuits at high-frequencies can be severe.

HTCC can easily provide hermeticity, unlike LTCC. It was used in many module packages, including the RF/DC feedthroughs on many, many airborne TR modules. Unfortunately, we can't show you a picture, because the subject is ITAR restricted.