Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8142131 | Clamping apparatus A clamping apparatus includes a frame and a pair of opposing clamping arms mounted on the frame for movement towards and away from each other to grasp or release a load. In one embodiment, each clamping arm is guided for movement with respect to the frame by an adju... | 03/27/2012 |
| 8091758 | Wave soldering bath In a conventional wave soldering bath, molten solder spouted from a second discharge nozzle did not have a uniform height, oxides were spouted from the nozzle opening and adhered to printed circuit boards, and constituent parts of the wave soldering bath were eroded... | 01/10/2012 |
| 8084717 | Reflow furnace The suction ports of a hot air blowing heater are arranged in a zigzag shape crossing the direction of travel of a printed circuit board, and hot air discharge nozzles project from inside or alongside the suction ports. Accordingly, in the reflow furnace according t... | 12/27/2011 |
| 8083459 | Clamping apparatus A clamping apparatus includes a frame and a pair of opposing clamping arms mounted on the frame for movement towards and away from each other to grasp or release a load. In one embodiment, each clamping arm is guided for movement with respect to the frame by an adju... | 12/27/2011 |
| 7993094 | Lift truck A lift truck includes a guide member secured to a mast of the lift truck and a guided member secured to a carriage vertically movable along the mast. The guided member engages with the guide member to resist twisting moments acting on the carriage and enable the car... | 08/09/2011 |
| 7988031 | Reflow furnace and heater for blowing hot air A reflow furnace using a conventional heater for blowing hot air has difficulty in reducing Δt and in stabilizing the oxygen concentration at a low level. In addition, it is difficult to uniformly discharge hot air from the discharge holes in a perforated plate of ... | 08/02/2011 |
| 7988030 | Wave soldering bath In a conventional wave soldering bath, the bottom surface of a bath body in a position which is below the inlet of a duct underwent erosion by molten solder and had a hole formed therein, causing molten solder to be spilled out from the hole. The cause of erosion of... | 08/02/2011 |
| 7976608 | Method and apparatus for manufacturing low melting point metal fine particles In a solder paste which is a mixture of a flux and low melting point metal particles, low melting point metal fine particles manufactured by a conventional method or apparatus therefor include particles having widely varying particle diameters. Accordingly, the sold... | 07/12/2011 |
| 7959055 | Wave soldering tank In a wave soldering tank using a conventional screw pump, pulsation sometimes occurred in which molten solder spouting from the discharge nozzle moved up and down. The cause of the occurrence of the pulsation in a screw pump was that the gap between the screw pump a... | 06/14/2011 |
| 7914595 | Fume removal method for a reflow furnace and a reflow furnace In a conventional reflow furnace equipped with a fume removal device, fume solids adhere to the inside of piping connecting it to the removal device, and a great amount of trouble was required for removal of the fume solids. The present invention maintains a fumes-c... | 03/29/2011 |
| 7906222 | Sliding material and a method for its manufacture A sliding material has a sintered layer formed atop a backing plate. The sintered layer contains 5-15 mass % of Bi nonuniformly distributed in a Cu—Sn alloy matrix consisting essentially of 8-12 mass % of Sn and a remainder of Cu. The sliding material can be manuf... | 03/15/2011 |
| 7905382 | Wave soldering tank A wave soldering tank is provided on which it is easy to perform maintenance, which does not have fluctuation of the height of spouted solder, which does not damage the rotating shaft of a discharge pump, and which can be stably used for long periods. The wav... | 03/15/2011 |
| 7854996 | Sliding material and a method for its manufacture A conventional Bi-containing sliding material sometimes underwent seizing in a sliding part operating at a high rotational speed. The present invention provides a sliding material which does not undergo seizing in a sliding part operating at a high rotational speed ... | 12/21/2010 |
| 7842118 | Recycling method for scrap silicon Scrap silicon from which a profit can be obtained taking into consideration the purchase price and refining cost of scrap silicon and the expected sale price of silicon products is selectively recovered, the recovered scrap silicon is refined, and silicon which can ... | 11/30/2010 |
| 7841822 | Manipulator for a lift truck A manipulator for use with a lift truck includes a guide assembly mountable on a mast of a lift truck, a carriage assembly supported for movement along the guide assembly, and an arm assembly mounted on the carriage assembly for supporting a lift truck attachment su... | 11/30/2010 |
| 7815882 | Method and apparatus for refining boron-containing silicon using an electron beam In a refining method for boron-containing silicon, boron-containing silicon is irradiated with an electron beam in a vacuum vessel to melt the boron-containing silicon. A boron compound-forming substance is introduced into the vacuum vessel, and boron contained in t... | 10/19/2010 |
| 7799241 | Liquid for preventing dispersion of or for fixing dispersible dust A fixing liquid for properly and economically suppressing or preventing dispersion of dust (asbestos dust) generated through weathering or demolition of a sprayed-on material containing asbestos is prepared by homogeneously incorporating a surfactant and a thickener... | 09/21/2010 |
| 7799133 | Crucible apparatus and method of solidifying a molten material A crucible apparatus includes a hollow crucible body which is open at its upper and lower ends and a bottom plate which is formed separately from the crucible body and can close off the lower end of the crucible body. A space for receiving a molten material is forme... | 09/21/2010 |
| 7793820 | Solder preform and a process for its manufacture A mixed mother alloy is prepared from a solder mixture comprising a pyrolyzable flux and high melting point metal particles, the mixed mother alloy is charged into a large amount of molten solder and stirred, and a billet is prepared. The billet can then be extruded... | 09/14/2010 |
| 7750475 | Lead-free solder ball A Sn—Ag—Cu based lead-free solder ball which does not undergo yellowing of its surface when formed into a solder bump on an electrode of an electronic part such as a BGA package. The solder ball has excellent wettability and does not form voids at the time of so... | 07/06/2010 |
| 7704478 | Method and apparatus for refining silicon using an electron beam A method and apparatus for refining silicon which can remove impurity elements such as phosphorus and antimony as well as impurity elements such as boron and carbon using an electron beam in the same vacuum chamber are provided. Silicon is irradiated and melted with... | 04/27/2010 |
| 7687019 | Refining apparatus for scrap silicon using an electron beam A refining apparatus for scrap silicon using an electron beam which is suitable for recycling of scrap silicon which is formed during the manufacture of silicon products such as silicon wafers includes a vacuum chamber, a crucible installed within the vacuum chamber... | 03/30/2010 |
| 7682468 | Lead-free solder alloy A lead-free solder alloy suitable for use in flow soldering of electronic components to printed wiring boards comprises 0.1-3 wt % of Cu, 0.001-0.1 wt % of P, optionally 0.001-0.1 wt % of Ge, and a balance of Sn. The solder alloy may further contain at least one ele... | 03/23/2010 |
| 7681777 | Solder paste and printed circuit board In a solder paste formed by blending an alloy powder and a flux, the alloy powder is a powder mixture formed by mixing at least one powder of a Sn—Zn based alloy and at least one powder of a Sn—Ag based alloy. The alloys powders are blended so that the compositi... | 03/23/2010 |
| 7654196 | Electric field forming apparatus for a fryer An electric field forming apparatus for a fryer includes an electrode which is disposed along an inner wall surface of an oil vat, and a power supply which supplies an alternating current at a frequency higher than a power line frequency to the electrode. ... | 02/02/2010 |
| 7632329 | Method of refining scrap silicon using an electron beam A method of refining scrap silicon using an electron beam includes a step of selectively preparing lumps of n-type scrap silicon containing a specific impurity element as a dopant, a step of crushing the prepared lumps of scrap silicon, a step of placing the crushed... | 12/15/2009 |
| 7628308 | Method of replenishing an oxidation suppressing element in a solder bath The rate of decrease of an oxidation suppressing element in a solder bath is measured during a soldering operation. Soldering is then carried out while replenishing the solder bath is then replenished during soldering so as to maintain the surface level of molten so... | 12/08/2009 |
| 6935553 | Reflow soldering method A soldering method includes exposing a solder paste including a solder powder and a flux on a member to a free radical gas and heating the solder paste to reflow the solder paste and vaporize any active components in the solder paste. Any flux residue is free of act... | 08/30/2005 |
| 7537728 | Method for increasing the effectiveness of a component of a material A manufacturing method for a material increases the effectiveness of a component so the component can be present in an amount which does not produce undesirable effects. A material is prepared containing the component in a first concentration. The component is at le... | 05/26/2009 |
| 7537427 | Clamping apparatus A clamping apparatus includes a frame and a pair of opposing clamping arms mounted on the frame for movement towards and away from each other to grasp or release a load. In one embodiment, each clamping arm is guided for movement with respect to the frame by an adju... | 05/26/2009 |
| 7526388 | Method of selecting and analyzing scrap silicon Non-destructive testing is performed on individual pieces of scrap silicon using an energy dispersive x-ray fluorescent analyzer to determine from the obtained spectral data whether a prescribed impurity element is contained therein. The electrical resistivity of ea... | 04/28/2009 |
| 7524748 | Method of interconnecting terminals and method of mounting semiconductor devices A method of interconnecting terminals so as to obtain an excellent electrical connection between terminals such as opposing electrodes and a mounting method for semiconductor devices using this connecting method are provided. Electrode pads 21 of a semiconduc... | 04/28/2009 |
| 7500839 | Foam molding apparatus A mold for molding is provided from which gas release can easily take place at the time of molding a foam body, which can minimize the amount of formation of burrs, and which can be easily processed. It is a mold for foam molding comprising a mold body comprising an... | 03/10/2009 |
| 7451805 | Pouring apparatus for molten metal and casting method A pouring apparatus for molten metal includes a stirrer installed in a reservoir. The stirrer is rotated by a rotational drive mechanism installed on the reservoir. Molten solder is placed into the reservoir, high melting point metal particles are charged into the m... | 11/18/2008 |
| 7425299 | Lead-free solder balls and method for the production thereof Lead-free solder balls having a good surface appearance with no appreciable surface defects such as seams and shrinkage cavities comprises an alloy having a composition consisting essentially of about 4.0% to about 6.0% by weight of Ag, about 1.0% to about 2.0% by w... | 09/16/2008 |
| 7338567 | Lead-free solder alloy A lead-free solder alloy suitable for use in flow soldering of electronic components to printed wiring boards comprises 0.1-3 wt % of Cu, 0.001-0.1 wt % of P, optionally 0.001-0.1 wt % of Ge, and a balance of Sn. The solder alloy may further contain at least one ele... | 03/04/2008 |
| 7282175 | Lead-free solder A lead-free solder includes 0.05-5 mass % of Ag, 0.01-0.5 mass % of Cu, at least one of P, Ge, Ga, Al, and Si in a total amount of 0.001-0.05 mass %, and a remainder of Sn. One or more of a transition element for improving resistance to heat cycles, a melting point ... | 10/16/2007 |
| 7282174 | Lead-free solder and soldered article The present invention provides a Sn—Zn based lead-free solder which can prevent peeling of solder from soldered portions even after the passage of long periods after soldering of portions to be soldered made of Cu. A Sn—Zn based lead-free solder according to the... | 10/16/2007 |
| 7255933 | Multi-layer sliding part and a method for its manufacture A multi-layer sliding part is prepared by a process including mixing 1–50 parts by volume of a Cu-plated solid lubricant powder with 100 parts by volume of a Cu-based alloy powder comprising 5–20 mass % of Sn and a remainder of Cu to form a mixed powder, sinteri... | 08/14/2007 |
| 7195184 | Method of crushing silicon blocks In a method of crushing silicon blocks, a silicon block to be crushed is heated and is then forcedly cooled. Subsequently, a crushing member which contains no metal component at least on a surface thereof is made to strike the cooled silicon block to thereby crush t... | 03/27/2007 |
