Patent ID: 6184463
Filing Date: 2001-02-06
Classification: H01L

Abstract:
An integrated circuit package comprising:a ceramic substrate having opposing upper and lower sides and formed from a plurality of stacked ceramic layers having a cut out configured to receive a flip chip, said cut out including through holes extending through to the lower side of said ceramic substrate, wherein one of said stacked ceramic layers includes a metallized conductive pattern forming a grounding signal path located substantially medially within the ceramic substrate;a gallium arsenide integrated circuit flip chip received within the cut out of the ceramic substrate and having conductive bumps formed thereon corresponding to the electrical input/output contacts of the flip chip, wherein the conductive bumps extend downward and are received within the through holes of the ceramic substrate;a controlled impedance line secured to the conductive bumps;a second integrated circuit chip mounted back-to-back on the flip chip received within the cut out, a conductive epoxy positioned between the flip chip and second integrated circuit chip and securing said chips to each other, wherein said conductive epoxy is connected to said grounding signal path for back-to-back grounding of said flip chip and second integrated circuit chip, said second integrated circuit chip including electrical contacts that are upward in direction; anda conductive pattern positioned on said upper side of said ceramic substrate and connected to said electrical contacts on said second integrated circuit chip.