Patent ID: 7550319

Claim:
A method of forming a light emitting diode chip carrier comprising: providing two or more low temperature co-fired ceramic (LTCC) tape layers; (a) each tape layer comprising 40 to 70 weight percent glass frit; (b) 30 to 60 weight percent refractory ceramic filler; (c) 0 to 10 weight percent of one or more inorganic pigments; dispersed in (d) an organic medium, wherein said refractory ceramic filler and said inorganic pigment have a refractive index in the range of 1.5 to 3.5 and said refractory ceramic filler has a flexural strength of at least 150 MPa; forming one or more cavities in said tape layers; providing at least two electrical vias and at least one thermal via in said tape layers; wherein said LTCC tape layers provide a desired circuit pattern and said circuit pattern is electrically connected through said electrical vias, thus, forming a functioning light emitting diode chip carrier.