Abstract: After a metal member of an alloy containing copper and nickel is arranged on at least one side of a ceramic substrate, the metal member and the ceramic substrate are heated in an atmosphere of an inert gas or in vacuo at a temperature between solidus and liquidus lines of the alloy to bond the metal member directly to the ceramic substrate.

Abstract: A metal layer 12 of aluminum or an aluminum alloy is formed on at least one side of a ceramic substrate 10, and a resist 14 having a predetermined shape is formed on the metal layer 12. Then, an etchant of a mixed solution prepared by mixing ferric chloride with water without adding any acids is used for etching and removing an undesired portion of the metal layer 12 to form a metal circuit 12 on the at least one side of the ceramic substrate 10.

Abstract: There is provided a metal/ceramic circuit board capable of eliminating discrepancy during mounting of parts to improve the reliability of mounting of the parts. The metal/ceramic circuit board has a ceramic substrate 10, and a metal circuit plate (a copper plate 14) bonded to the ceramic substrate 10, the metal circuit plate having a thickness which is more than 0.25 mm and which is less than 0.3 mm, and the metal circuit plate having a skirt spreading length (a dimensional difference between the bottom and top portion of the peripheral edge portion of the metal circuit plate) of less than 50 ?m.

Abstract: In a method for producing a metal/ceramic bonding member wherein an electroless nickel alloy plating layer 18 is formed on a predetermined portion of the surface of an aluminum plate 12 which is bonded to at least one side of a ceramic substrate 10 and which is formed so as to have a predetermined circuit pattern, an alkali peeling type resist 16 having a predetermined shape is applied on the surface of the aluminum plate 12 before forming the electroless nickel alloy plating layer 18, and then, a portion of the surface of the aluminum plate 12, on which the resist 16 is not applied, is activated with an acidic zinc immersion solution containing a fluoride or silicofluoride. Then, after the electroless nickel alloy plating layer 18 is formed, the resist 16 is removed with an alkali.

Abstract: After copper plates 14 are bonded to both sides of a ceramic substrate 10 via a brazing filler metal 12, UV curing alkali peeling type resists 16 are applied on predetermined portions of the surfaces of the copper plates 14 to etch undesired portions of the copper plates 14 to form a metal circuit portion. While the resists 16 are maintained, undesired portions of the brazing filler metal 12 and a reaction product, which is produced by a reaction of the brazing filler metal 12 with the ceramic substrate 10, are removed (or undesired portions of the brazing filler metal 12 and a reaction product, which is produced by a reaction of the brazing filler metal 12 with the ceramic substrate 10, are removed, and the side portion of the metal circuit portion is etched). Thereafter, the resists 16 are peeled off, and an Ni—P electroless plating 18 is carried out.

Abstract: There is provided a method for producing a metal/ceramic bonding article, the method including the steps of: bonding a metal plate 12 of an alloy containing copper and nickel directly to at least one side of a ceramic substrate 10; applying a resist 14 on a predetermined portion of the metal plate 12 to remove an undesired portion of the metal plate 12 by etching; and removing the resist 14 to form a pattern having a predetermined shape of the alloy on the ceramic substrate 10. According to this method, it is possible to reduce the displacement failure of parts to improve productivity and to prevent bonding failure during the mounting of a semiconductor device or the like thereon.

Abstract: A metal layer 12 of aluminum or an aluminum alloy is formed on at least one side of a ceramic substrate 10, and a resist 14 having a predetermined shape is formed on the metal layer 12. Then, an etchant of a mixed solution prepared by mixing ferric chloride with water without adding any acids is used for etching and removing an undesired portion of the metal layer 12 to form a metal circuit 12 on the at least one side of the ceramic substrate 10.

Abstract: There is provided a method for producing a metal/ceramic bonding article, the method including the steps of: bonding a metal plate 12 of an alloy containing copper and nickel directly to at least one side of a ceramic substrate 10; applying a resist 14 on a predetermined portion of the metal plate 12 to remove an undesired portion of the metal plate 12 by etching; and removing the resist 14 to form a pattern having a predetermined shape of the alloy on the ceramic substrate 10. According to this method, it is possible to reduce the displacement failure of parts to improve productivity and to prevent bonding failure during the mounting of a semiconductor device or the like thereon.

Abstract: There is provided a method for producing a metal/ceramic bonding substrate, the method being capable of improving the linearity of a pattern and preventing the occurrence of defective plating to improve the visual failure of plating and ensure the adhesion of plating.

Abstract: There is provided a metal/ceramic circuit board capable of eliminating discrepancy during mounting of parts to improve the reliability of mounting of the parts. The metal/ceramic circuit board has a ceramic substrate 10, and a metal circuit plate (a copper plate 14) bonded to the ceramic substrate 10, the metal circuit plate having a thickness which is more than 0.25 mm and which is less than 0.3 mm, and the metal circuit plate having a skirt spreading length (a dimensional difference between the bottom and top portion of the peripheral edge portion of the metal circuit plate) of less than 50 &mgr;m.

Abstract: After a metal member of an alloy containing copper and nickel is arranged on at least one side of a ceramic substrate, the metal member and the ceramic substrate are heated in an atmosphere of an inert gas or in vacuo at a temperature between solidus and liquidus lines of the alloy to bond the metal member directly to the ceramic substrate.

Abstract: There is provided a metal/ceramic circuit board capable of eliminating discrepancy during mounting of parts to improve the reliability of mounting of the parts. The metal/ceramic circuit board has a ceramic substrate 10, and a metal circuit plate (a copper plate 14) bonded to the ceramic substrate 10, the metal circuit plate having a thickness of 0.1 mm to 0.5 mm, and the metal circuit plate having a skirt spreading length (a dimensional difference between the bottom and top portion of the peripheral edge portion of the metal circuit plate) of less than 50 &mgr;m.

Abstract: There is provided a method for producing a metal/ceramic bonding article, the method including the steps of: bonding a metal plate 12 of an alloy containing copper and nickel directly to at least one side of a ceramic substrate 10; applying a resist 14 on a predetermined portion of the metal plate 12 to remove an undesired portion of the metal plate 12 by etching; and removing the resist 14 to form a pattern having a predetermined shape of the alloy on the ceramic substrate 10. According to this method, it is possible to reduce the displacement failure of parts to improve productivity and to prevent bonding failure during the mounting of a semiconductor device or the like thereon.

Abstract: There is provided a method for producing a metal/ceramic bonding article, the method including the steps of: bonding a metal plate 12 of an alloy containing copper and nickel directly to at least one side of a ceramic substrate 10; applying a resist 14 on a predetermined portion of the metal plate 12 to remove an undesired portion of the metal plate 12 by etching; and removing the resist 14 to form a pattern having a predetermined shape of the alloy on the ceramic substrate 10. According to this method, it is possible to reduce the displacement failure of parts to improve productivity and to prevent bonding failure during the mounting of a semiconductor device or the like thereon.

Abstract: There is provided a metal/ceramic bonding article which ensures sufficient thermal shock resistance and has a substrate having a small outside dimension and which has both high reliability and compactness. The metal/ceramic bonding article comprises: a ceramic substrate; and a metal plate bonded to the ceramic substrate via a brazing filler metal, wherein the brazing filler metal protrudes from the bottom face of the metal plate by a length which is longer than 30 &mgr;m and which is 250 &mgr;m or less, or wherein the brazing filler metal protrudes from the bottom face of the metal plate by a length which is 25% or more of the thickness of the metal plate.

Abstract: There is provided a metal/ceramic bonding article which ensures sufficient thermal shock resistance and has a substrate having a small outside dimension and which has both high reliability and compactness. The metal/ceramic bonding article comprises: a ceramic substrate; and a metal plate bonded to the ceramic substrate via a brazing filler metal, wherein the brazing filler metal protrudes from the bottom face of the metal plate by a length which is longer than 30 &mgr;m and which is 250 &mgr;m or less, or wherein the brazing filler metal protrudes from the bottom face of the metal plate by a length which is 25% or more of the thickness of the metal plate.

Abstract: There is provided a metal/ceramic circuit board capable of eliminating discrepancy during mounting of parts to improve the reliability of mounting of the parts. The metal/ceramic circuit board has a ceramic substrate 10, and a metal circuit plate (a copper plate 14) bonded to the ceramic substrate 10, the metal circuit plate having a thickness of 0.1 mm to 0.5 mm, and the metal circuit plate having a skirt spreading length (a dimensional difference between the bottom and top portion of the peripheral edge portion of the metal circuit plate) of less than 50 &mgr;m.

Abstract: After copper plates 14 are bonded to both sides of a ceramic substrate 10 via a brazing filler metal 12, UV curing alkali peeling type resists 16 are applied on predetermined portions of the surfaces of the copper plates 14 to etch undesired portions of the copper plates 14 to form a metal circuit portion. While the resists 16 are maintained, undesired portions of the brazing filler metal 12 and a reaction product, which is produced by a reaction of the brazing filler metal 12 with the ceramic substrate 10, are removed (or undesired portions of the brazing filler metal 12 and a reaction product, which is produced by a reaction of the brazing filler metal 12 with the ceramic substrate 10, are removed, and the side portion of the metal circuit portion is etched). Thereafter, the resists 16 are peeled off, and an Ni—P electroless plating 18 is carried out.