Abstract:
A method for constructing a composite solder transfer moldplate for flip chip wafer bumping of a substrate, comprising the steps of coating at least one polymer layer onto a first side of a transparent plate, the plate having a thermal expansion coefficient similar to that of the substrate; and forming a multiplicity of cavities in a polymer layer on one side of the plate, each cavity being for receiving solder. A moldplate made by the method. The structure has required behavior through temperature excursions between room temperature and various solder molten temperatures.
Abstract:
Improved interconnects are produced by injection molded solder which fills mold arrays with molten solder so that columns that have much greater height to width aspect ratios greater than one are formed, rather than conventional flip chip bumps. The columns may have filler particles or reinforcing conductors therein. In the interconnect structures produced, the cost and time of a subsequent underfill step is reduced or avoided. The problem of incompatibility with optical interconnects between chips because underfills require high loading of silica fillers which scatter light, is solved, thus allowing flip chips to incorporate optical interconnects.
Abstract:
Disclosed is a new process that permits the transfer and reflow of solder features produced by Injection Molded Solder (IMS) from a mold plate to a solder receiving substrate without the use of flux. Several embodiments produce solder transfer and reflow separately or together and use either formic acid vapor or partial concentration of hydrogen, both in nitrogen, as the oxide reducing atmosphere. A final embodiment produces fluxless transfer and reflow in only nitrogen through the use of ultrasonic vibration between the solder filled mold plate and solder receiving substrate.
Abstract:
A method and apparatus for forming solder bumps by molten solder deposition into cavity arrays in a substrate immediately followed by solidification of molten solder such that precise replication of cavity volumes is consistently achieved in formed solder bump arrays. Various solder filling problems, such as those caused by surface tension and oxidation effects, are overcome by a combination of narrow molten Solder dispense slots and solidification of dispensed molten solder.
Abstract:
An oral composition which is adapted to be dispersed in an aqueous carrier substantially immediately prior to administration comprises a multiplicity of particles comprising an active substance, the particles being combined with one or more gelling or swelling agents capable of forming a viscous medium around the particles in an aqueous carrier as well as being provided with a masking surface layer when dispersed in the aqueous carrier. This serves to mask uneven surfaces on the particles and prevent them from adhering to oral mucosa when the composition is ingested and thus makes it easier to administer large dosages of an active substance. The masking surface layer is preferably provided by an increased viscosity of the viscous medium in the immediate vicinity of the particles relative to the viscosity of the surrounding aqueous carrier. A ready-to-use composition is prepared by mixing the composition with an aqueous carrier substantially immediately prior to administration of the composition.
Abstract:
A surveillance device, e.g. a fire alarm or an intrusion detector, includes a mount having a connector block, and an insert having a sensor assembly, a printed circuit board with evaluation electronics, and an electrical contact to the connector block. The printed circuit board is a plug-in card with a contact strip. For insertion, with the mount disposed at a horizontal surface, for example, the insert is first moved vertically and then displaced horizontally. In the horizontal displacement, an electrical connection is established between the contact strip and the connector block.
Abstract:
A circuit and method for iteratively estimating Fourier coefficients of one or more Fourier components of a measuring signal utilizes a filter to determine the Fourier coefficients for sampling time k-1. The coefficients are utilized to obtain an estimate of the measuring signal at sampling time k. A subtractor circuit subtracts an actual sample of the measuring signal at sampling time k from the estimate of the measuring signal at sampling time k to obtain a difference signal. The difference signal is inputted back into the filter to determine an estimate of the Fourier coefficients at sampling time k.
Abstract:
There is described a solid pharmaceutical preparation for oral administration which produces high and long-lasting blood and tissue levels, containing 9-deoxo-11-deoxy-9,11-[imino[2-(2-methoxyethoxy)-ethylidene]oxy]-(9S)-erythromycin as active substance, in which the active substance must be intimately mixed with a basic excipient in a ratio of 1 mol of active substance to at least 2 gram-equivalents of basic excipient, and the preparations are coated with a gastric juice-resistant lacquer which is soluble in a pH range of between 5.5 and 6.8, and processes for preparing them. The solid pharmaceutical preparations include tablets, pellets or granules and a syrup can be produced from the latter.
Abstract:
An infrared intrusion detector having a predetermined number of rows of radiation reception zones comprises a primary reflector and a secondary reflector for each row of radiation reception zones. The primary reflectors and their associated secondary reflectors form a folded radiation path. The folded radiation path allows for compact construction and simple manufacturing of the infrared intrusion detector. One reflector of each radiation reception zone forms together with the infrared sensor a compact structural unit. The other reflectors of each radiation reception zone are combined to form a further structural unit which is arranged in a predetermined spaced relationship to the first compact structural unit. In order to achieve uniform detection sensitivity in radiation reception zones having different angles of inclination to the horizontal plane, a larger focal length is chosen for radiation reception zones with smaller angles of inclination and longer range. Likewise, to achieve uniform detection sensitivity even with oblique infrared radiation impingement, the surface area of the primary reflectors increases within each horizontal row from the middle to the sides.
Abstract:
A method for the preparation of pharmaceuticals which comprises using a piezoelectric dosing system to dot liquid, dissolved or suspended active substance onto a pharmaceutical carrier.