摘要:
A brazing product for fluxless brazing comprises a substrate and a filler metal-forming composition applied to the substrate. The substrate preferably comprises aluminum, an aluminum alloy or another metal and may include at least one layer of a ceramic, carbide or nitride. The filler metal-forming composition comprises a liquid-forming layer comprising silicon and a braze-promoting layer comprising one or more metals selected from the group comprising nickel, cobalt, palladium and iron. The liquid-forming layer comprises one or more material layers. Where the liquid-forming layer comprises a plurality of layers, it may include at least one layer consisting essentially of silicon.
摘要:
In a rotating disk reactor (1) for growing epitaxial layers on substrate (3), gas directed toward the substrates at different radial distances from the axis of rotation of the disk has substantially the same velocity. The gas directed toward portions of the disk remote from the axis (10a) may include a higher concentration of a reactant gas (4) than the gas directed toward portions of the disk close to the axis (10d), so that portions of the substrate surfaces at different distances from the axis (14) receive substantially the same amount of reactant gas (4) per unit area. A desirable flow pattern is achieved within the reactor while permitting uniform deposition and growth of epitaxial layers on the substrate.
摘要:
An apparatus includes a transmitter portion which transmits a defined beam of eyesafe laser energy, a receiver portion which receives reflected energy from the beam, and a further portion which analyzes information in the received energy so as to detect the presence of a moving projectile.
摘要:
An improved transfer printing press of the type having a plurality of beds having a top surface, a device for squeegeeing ink through a screen onto a substrate, a device for curing the ink remaining on the substrate, and a device for drawing air through the bed, wherein the improvement comprises an air permeable material interposed between the top surface of the bed and the substrate to be printed to keep said substrate at a substantially uniform temperature.
摘要:
A method for use in sensing a moving object by doppler global sensing includes illuminating the object with energy, filtering energy reflected by the object with a frequency selective surface filter, and sensing the filtered energy. An associated system includes a laser operable to illuminate an object with energy and a frequency selective surface operable to filter energy reflected off the object. The system also includes a camera operable to receive energy reflected off the object that is passed by the frequency selective surface.
摘要:
A dryer for drying printed articles comprising a drying chamber, a plurality of conveyor belts having first and second ends, the conveyor belts located substantially within the drying chamber, a motor adapted to drive the plurality of conveyor belts, and a burner adapted to supply heated air to the drying chamber.
摘要:
A system generates and retrieves relevant electronic information required by a user initiating an electronic search on the system. The system comprises a user-interactive search engine and a knowledge database, which stores knowledge information that is formatted. Additionally, the system includes a plurality of functional software modules that enables a user to complete an interactive search and find a solution to a task based on entered context information and keywords. A list of keywords is displayed to the user and the user selects those keywords that are relevant to the solution desired. The search engine looks for the articles containing the identified keywords. If no article is found with the search terms, the search is expanded to the Internet. The user may then modify the information returned from the Internet, format the information and save the information as a new recipe.
摘要:
A detachable scraper attachment for a flood bar having a pair of opposing opposite edges comprising a portion adapted to mount on a portion of the flood bar holder, a flange having an upper and lower edge, the lower edge being generally arcuate, the upper edge attached to the channel portion, and means for detachably affixing the scraper attachment to the edges of the flood bar.
摘要:
A system and method for evenly heating a substrate placed in a wafer carrier used in wafer treatment systems such as chemical vapor deposition reactors, wherein a first pattern of wafer compartments is provided on the top of the wafer carrier, such as one or more rings of wafer carriers, and a second pattern of inlaid material dissimilar to the wafer carrier material is inlaid on the bottom of the wafer carrier, and the second pattern of inlaid material is substantially the opposite of the first pattern of wafer compartments, such that there are at least as many material interfaces in intermediate regions without wafer compartments as there are in wafer carrying regions with wafers and wafer compartments.
摘要:
A bundling system with improved locking tie head comprising a smooth planar strap and a locking head with two flexible independent L-shaped pawls. One end of the pawl is anchored in the locking head. The locking head has two transverse pawl cavities allowing flexural movement of the pawl during insertion of the planar strap and locking engagement to prevent withdrawal of the strap.