摘要:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal-ceramic junction circuit board, easily controlling a cross-sectional shape with a smaller number of steps or at a low cost, and manufacturing the circuit board that has high reliability in thermal impact resistance and insulation characteristic.SOLUTION: After a Cu plate 14 is joined to both surfaces of a ceramic substrate 10 through a solder 12, a UV-curing alkaline peeling type resist 16 is applied on a predetermined portion of the surface of Cu plate 14 for etching an unrequired portion of the Cu plate 14 to form a metal circuit part. While the resist 16 is maintained, an unnecessary solder 12 and a reactive product between the solder 12 and the ceramic substrate 10 are removed (otherwise, an unnecessary solder 12 and a reactive product between the solder 12 and the ceramic substrate 10 are removed for etching on the side surface part of the metal circuit part). Then, the resist 16 is released and Ni-P electroless plating 18 is performed.
摘要:
PROBLEM TO BE SOLVED: To solve the problem that a crack is formed in a bonding surface due to difference in a thermal expansion in each of materials, because a ceramics base member is fitted to a metallic base board through a metallic layer and a solder in a conventional ceramic electronic circuit board. SOLUTION: A melt is obtained by melting aluminum or aluminum alloy in a vacuum or an inert gas. Thereafter, the melt is brought into contact with the ceramics base member inside a mold under the vacuum or the inert-gas atmosphere. At that time, the melt is rigidly bonded to the ceramics base member by retaining to cool in a direct contact without interposing the oxidized layer of a metal surface, to each interface, and the melt is bonded to the ceramics base member by means of a brazing material. Otherwise, the melt is bonded to the ceramics base member in the order opposite to the above-described procedure. The metallic base board is specified to have a resistive strength of 320 MPa or less and a thickness of 1 mm or more. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal-ceramic bonded circuit board, by which a cross-sectional shape of a metal-ceramic bonded circuit board can be easily controlled in a small number of man-hour or at a low cost, and a metal-ceramic bonded circuit board having higher reliability in thermal shock resistance or insulating property can be manufactured.SOLUTION: After a Cu plate 14 is bonded with a brazing material 12 to both surfaces of a ceramic substrate 10, a UV-curable alkali stripping type resist 16 is applied to a predetermined part on a surface of the Cu plate 14, and an unnecessary part of the Cu plate 14 is etched to form a metal circuit part. While maintaining the resist 16, an unnecessary brazing material 12 and a reaction product between the brazing material 12 and the ceramic substrate 10 are removed (otherwise, the unnecessary brazing material 12 and the reaction product between the brazing material 12 and the ceramic substrate 10 are removed and a side face of the metal circuit part is etched), and then, the resist 16 is stripped and Ni-P electroless plating 18 is applied.
摘要:
PROBLEM TO BE SOLVED: To provide a metal ceramic circuit board of excellent heat cycle resistance which is suitable for mounting a large power electronic component such as a power module, and to provide the power module using the board. SOLUTION: An insulating substrate board for a semiconductor comprises a metal alloy layer containing silicon mainly made of aluminum, copper, zinc or nickel formed on at least one surface portion of a ceramic substrate board, and the Vickers hardness of the metal alloy layer is not less than 25 and less than 40. The ceramic substrate board is made of a material selected from a group consisting of alumina, aluminum nitride, and silicon nitride. A semiconductor chip is provided on the other surface of the ceramic substrate board to form the power module. COPYRIGHT: (C)2007,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a heat-dissipating plate of a metal-ceramic composite directly joined to a ceramic insulating substrate through a cost-effective process, and to provide a method of manufacturing the heat-dissipating plate, in order to solve a problem that, although metal-ceramic composite, which is produced by impregnating a porous preform made of ceramics with metal, has been used as a conventional heat-dissipating plate for a power module, an application of pressure in the impregnation process entails a massive production facility. SOLUTION: The method of manufacturing a heat-dissipating plate includes steps of: mixing silicon carbide powder and silver powder; applying a pressure on the resultant mixture, and forming a preform 10; placing an aluminum 11 in contact with the preform; and heating the preform and the aluminum together to impregnate the preform with aluminum. Furthermore, the method includes a step of joining the impregnated aluminum to the ceramic insulating substrate. The metal is magnesium, zinc, gallium, lead, or tin. The content ratio of metal relative to the preform measures from 2 wt.% or more to 10 wt.% or less. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal-ceramic joined body, in which the width of fillet can be altered freely, and by which the metal-ceramic joined body having high reliability to repeated heat cycle can be produced. SOLUTION: In the method for manufacturing the metal-ceramic joined body composed of a ceramic base plate 10 and a metal plate 16 which are joined through an active metal-containing braze material 12, after coating a prescribed area on the ceramic base plate 10 with the braze material 12 and coating an area surrounding the braze material 12 on the ceramic base plate 10 with an inert paste material 14 not reacting with the ceramic base plate 10, the metal plate 16 is arranged on the braze material 12 and the paste material 14, and the ceramic base plate 10 is joined with the metal plate 16. Thereafter, a metal circuit is formed on the ceramic base plate 10 by coating an area corresponding to the braze material 12 on the metal plate with a resist 18, and eliminating an unnecessary part of the metal plate 16. COPYRIGHT: (C)2008,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To enhance metal-ceramic bonding strength and improve product quality. SOLUTION: The invented apparatus for manufacturing a metal-ceramic composite member joins a metal to the surface of a ceramic member by retaining the ceramic member in a mold, pouring molten metal into the mold and cooling it for solidification. The apparatus comprises an atmosphere changing section 1, a preheating section 2, a molten metal pouring section 3, a cooling/joining section 4 and a slow cooling section 5. The atmosphere changing section 1 changes an atmosphere in the mold with the ceramic member being retained therein to lower the oxygen content to a prescribed value or less. The preheating section 2 preheats the mold. The molten metal pouring section 3 keeps the mold at a molten metal pouring temperature and pours the molten metal into the mold. The cooling/joining section 4 lowers the mold temperature to a temperature at which the molten metal commences to solidify, and joins the metal to the surface of the ceramic member. The slow cooling section 5 cools the mold slowly. COPYRIGHT: (C)2007,JPO&INPIT