Surapol
Surapol Padungthon, Bethlehem, PA US
Patent application number | Description | Published |
---|---|---|
20130274357 | HYBRID ANION EXCHANGER IMPREGNATED WITH HYDRATED ZIRCONIUM OXIDE FOR SELECTIVE REMOVAL OF CONTAMINATING LIGAND AND METHODS OF MANUFACTURE AND USE THEREOF - Polymeric anion exchanger are used as host materials in which sub-micron sized hydrated Zr(IV) oxides (HZrO) particles are irreversibly dispersed within the ion exchange medium, such as beads or fibers. The HZrO can be impregnated into the pore structure of resin by mixing the parent anion exchange resin with zirconium solution prepared by pre-calcined zirconium oxide dissolved in concentrated mixture of alcohol and acid, and then followed by precipitation of HZrO particles within the resin by using alkaline solution. Since the anion exchangers have positively charged such as quaternary ammonium functional groups, anionic ligands such as arsenate, fluoride can transport in and out of the gel phase without subjected to the Donnan exclusion effect. Consequently, anion exchanger-supported HZrO submicron particles exhibit significantly greater capacity to remove arsenic and fluoride in comparison with parent anon exchange resins. Known cation exchange resins as support materials do not offer high arsenic or fluoride removal capacity. | 10-17-2013 |
Surapol Raadnui, Nontaburi TH
Patent application number | Description | Published |
---|---|---|
20120118051 | APPARATUS AND METHOD FOR PARTICLE ANALYSIS - A method for wear analysis. The method includes introducing a lubricant sample into a tube. The lubricant sample includes debris, wear, or other particles of different sizes. The tube includes a number of filter patches, each of a predetermined pore size. The method further includes centrifuging the tube for displacing the lubricant sample, and the wear particles thereof, along a length of the tube. The filter patches impede passage of wear particles of a size larger than their pore size therethrough, thereby separating the wear particles according to the sizes of the wear particles. The tube is attached to a handler of a centrifuge for centrifugation by the centrifuge. Multiple tubes can be attached to multiple handlers of the centrifuge for simultaneous centrifugation by the centrifuge. Centrifugation tubes (or tubes) are also provided by the present disclosure. | 05-17-2012 |
Surapol Sawatjeen, Bangkok TH
Patent application number | Description | Published |
---|---|---|
20100304532 | Semiconductor Die Attachment Method Using Non-Conductive Screen Print and Dispense Adhesive - A uniform layer of non-conductive material, e.g., epoxy, is screen printed onto the backside of an integrated circuit wafer to a required thickness, and then heated until it is hard cured (C-stage). The integrated circuit wafer having the hard cured coating is then sawn apart to separate the individual integrated circuit dice. A non-conductive adhesive is dispensed onto mating faces of die attach paddles of leadframes. The dice are placed into the non-conductive adhesive and then the die and die attach paddle assembly are heated to hard cure the adhesive between the mating faces of the die and die attach paddle. This provides long term electrical isolation of the integrated circuit die from the die attach paddle, and effectively eliminates silver migration from the die attach paddle which causes conductive paths to form that increase unwanted leakage currents in the die and ultimately cause failure during operation thereof. | 12-02-2010 |
Surapol Sawatjeen, Chacherngsao TH
Patent application number | Description | Published |
---|---|---|
20140235033 | NON-CONVENTIONAL METHOD OF SILICON WAFER SAWING USING A PLURALITY OF WAFER SAW ROTATIONAL ANGLES - A silicon wafer saw can be set to either three or four different cutting angle orientations from a zero degree reference to produce integrated circuit dice having corners greater than 90 degrees. Three different saw angle orientations will produce six sided dice, and four different saw cutting angle orientations will produce eight sided dice. | 08-21-2014 |