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Class 228/202 - Chemical


Subclass of Class 228 - Metal fusion bonding
Definition: Process wherein the foreign material is removed at least
No. of patents: 11
Last issue date: 08/02/2005


NumberTitleIssue Date
6923364Method for manufacturing air compressor assembly
A method for manufacturing an air compressor assembly including, between a tank welding step and a final assembling step, a step of submerging a welded tank into a dip tank that contains cooling liquid treated with a corrosion inhibitor. In a preferred embodiment, i...
08/02/2005
6913520All-in-one polishing process for a semiconductor wafer
A semiconductor wafer has a top surface and an edge bevel surface, and a first material layer and a second material layer are respectively formed on the top surface and the edge bevel surface. A surface chemical mechanical polishing (surface CMP) process is performe...
07/05/2005
6666369Semiconductor device manufacturing method, electronic parts mounting method and heating/melting process equipment
There is provided a semiconductor device manufacturing method which comprising the steps of forming solder bumps on an underlying metal film of a semiconductor device, and placing the semiconductor device and the solder layer in a reduced pressure atmosph...
12/23/2003
6575354Method for producing tin-silver alloy plating film, the tin-silver alloy plating film and lead frame for electronic parts having the film
The present invention relates to a method for producing a tin-silver alloy plating film having an excellent wettability and improved in solderability and said method comprises a step of heat treating the surface of the tin-silver alloy plating film prefer...
06/10/2003
6119927Method and apparatus for placing and attaching solder balls to substrates
A method and apparatus for placing and attaching solder balls to a substrate having conductive pads in a predetermined pattern is disclosed. The substrate is placed on a carrier plate. An alignment plate having holes corresponding to the predetermined pat...
09/19/2000
6050479Defluxing agent cleaning method and cleaning apparatus
The defluxing agent for flux residue after soldering contains an acid (preferably an organic acid, and particularly an acid stronger than abietic acid; for example, acrylic acid, acetic acid, propionic acid, benzoic acid) and an organic solvent (for examp...
04/18/2000
6042659Method of coating the seams of a welded tube
An improved method of coating the welded seam of a metal tube comprising heating the weld area only of the metal tube to a first temperature which is less than the melting temperature of the protective metal coating, applying the protective metal coating ...
03/28/2000
5988485Flux cleaning for flip chip technology using environmentally friendly solvents
A method of assembling a substrate and die in a flip chip configuration uses a non-hazardous cleaning solvent to clean the flux residue. The non-hazardous cleaning solvent utilized is Ionox obtained from Kyzen Corporation. Optimized process parameters are...
11/23/1999
5312027Precleaning of soldered circuit cards to prevent white residue
Following soldering of electrical components on a circuit card in a soldering process that includes use of an aqueous-based flux, the circuit card, containing the soldered electrical components, is exposed to a dilute aqueous basic solution prior to a fin...
05/17/1994
5035042Method for producing galvanized tubing
An improved method of manufacturing galvanized steel tubing from steel strip having at least one galvanized surface, which surface becomes the exterior surface of the tubing is provided. In the method of the invention, after the steel strip is roll-formed...
07/30/1991
4898318Copper radiator for motor cars excellent in corrosion resistance and method of manufacturing the same
An improved copper radiator for motor cars comprising a plurality of tubes adapted for the flow of a heat-exchanging medium therethrough, fins bonded directly with solder to said tubes to form a copper core and wherein said core is bonded with solder to a...
02/06/1990
 
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