Patent ID: 9119297
Filing Date: 2015-08-25
Classification: B22F,C04B,C22C,H01L,H05K

Abstract:
1. An electronic component element housing package, wherein the package is produced by firing a non-sintered ceramic substrate for housing an electronic component element and a non-sintered metal layer for bonding to the ceramic substrate to form an electrical path, simultaneously in a reducing atmosphere; wherein the package comprises layered ceramics, in which the metal layer is bonded on the ceramic substrate; wherein the ceramic substrate comprises alumina (Al wherein the sintering agent comprises magnesia (MgO), and at least 1 type selected from silica (SiO wherein the content level of the partially stabilized zirconia in the ceramic substrate is within a range of 10-30% by weight; wherein the mole fraction of the yttria in the partially stabilized zirconia is within a range of 0.015-0.035; wherein the content level of the sintering agent in the ceramic substrate is within a range of 1.5-4.5% by weight; wherein the residual portion other than the partially stabilized zirconia and the sintering agent in the ceramic substrate is the alumina; wherein the metal layer comprises tungsten (W), molybdenum (Mo), and a ceramic component having glass and alumina; wherein the content level of the tungsten in the metal layer is within a range of 70-94% by weight; wherein the content level of the molybdenum in the metal layer is within a range of 3-20% by weight; wherein the content level of the ceramic component in the metal layer is within a range of 3-20% by weight; and wherein at least 60% of zirconia crystals in the ceramic substrate after firing is in tetragonal phase.