摘要:
A fertilizer product in granular form with sustained action is provided by spraying a silicate-based solution on the surface of the fertilizer granules in a conventional coating machine which is maintained at temperatures ranging from 20.degree. to 100.degree. C. The coating solution comprises 1 to 50% by weight of a silicate and/or silicic acid ester based on the weight of the fertilizer material to be treated, 0.001 to 1.0 part by weight of a metal and/or non-aqueous metallic compound (first additives), 0.001 to 1.0 part by weight of an aqueous metallic compound (second additives), 0.001 to 1.0 part by weight of an inorganic mineral (third additives), and optionally high molecular weight organic compound, wherein all parts described above are based on the weight of the silicate and/or silicic acid ester used. The coated fertilizer granules are subject to heat-treatment for 10 seconds to 10 days under conditions that the relative humidity and the temperature be maintained at 5 to 95% and 10.degree. to 250.degree. C., respectively.
摘要:
A connection component for a semiconductor chip includes a substrate having a gap over which extends a plurality of parallel spaced apart leads. The ends of the leads are adhered to the substrate either by being bonded to contacts or being embedded in the substrate. The connection component can be formed, in one embodiment, by stitch bonding wire leads across the gap. In another embodiment, a prefabricated lead assembly supporting spaced apart parallel leads is juxtaposed and transferred to the substrate. The connection component is juxtaposed overlying a semiconductor chip whereby leads extending over the gap may have one end detached and bonded to an underlying chip contact.
摘要:
A process is disclosed for producing a metal-organic polymer combination by contacting the polymer with a plasma followed by an aqueous solution of a metal salt. In one embodiment a water or nitrous oxide plasma is used to treat a polyimide or a fluorinated polymer. The polymer is combined with a metal cation, the metal being a catalyst for a conventional electroless coating after which it is contacted with an electroless metal plating bath for the formation of electrical circuits and especially for plating high aspect ratio vias in microcircuits. Unlike the conventional electroless process, the cationic catalytic metal is not reduced to a zero valent metal catalyst prior to the application of the electroless metal coating solution.The process also improves the wettability of the polymer, especially the fluorinated polymer and is especially useful in improving the wettability of high aspect ratio vias.
摘要:
Improved via-filling compositions for producing conductive vias in circuitized ceramic substrates, particularly multilayer substrates, without cracking and/or loss of hermetic sealing. The via-filling compositions comprise pastes containing a mixture of (a) ceramic and/or glass spheres of substantially- uniform diameter between about 0.5 and 6 .mu.m, (b) conductive metal particles or spheres having a maximum dimension or diameter between about 1/3 and 1/4 of the diameter of the ceramic and/or glass spheres, and (c) a binder vehicle. The formed conductive via bodies comprise a uniform conductive skeletal network of sintered metal particles densely packed within a uniform matrix of the co-sintered ceramic and/or glass spheres, which matrix is hermetically fused and integrated with ceramic layers forming the wall of the via in the ceramic circuit substrate.
摘要:
A pattern is formed on a substrate by providing on the substrate a dielectric composition; defining a pattern in said dielectric; depositing metal and then micromachining the metal to provide the desired pattern on the substrate.
摘要:
A process for preparing a substrate, e.g., an epoxy printed circuit board, for subsequent metallization. Active chemical sites are formed adhering to the substrate surface. The substrate is then exposed to a vapor of a volatile organometallic compound, which chemically reacts with the active sites and is decomposed to at least a species of the metal constituent of the compound. This species adheres to the substrate and can be transformed into the free metal which is useful as a seed for subsequent electroless deposition of a metal thereon. If selective deposition is desired, a resist masking layer is used prior to forming the seed layer. Volatile organopalladium compounds, such as (cyclopentadienyl)(allyl)palladium and bis(allyl)pallidium, are particularly effective for depositing a palladium seed which is particularly effective for electroless deposition of copper.
摘要:
Substrates having integrated rigid and flexible regions and methods of fabricating such substrates are disclosed. The substrates may advantageously be used for mounting semiconductor chips used in flexible microelectronic assemblies.
摘要:
A packaged microelectronic element includes connection component incorporating a dielectric layer (22) carrying traces (58) remote from an outer surface (26), posts (48) extending from the traces and projecting beyond the outer surface of the dielectric, and pads (30) exposed at the outer surface of the dielectric layer, the pads being connected to the posts by the traces. The dielectric element overlies the front surface of a microelectronic element, and contacts (74) exposed on the front surface of the microelectronic element are connected to the pads by elongated leads (76) such as wire bonds. Methods of making the connection component are also disclosed.
摘要:
A method of manufacturing a microelectronic package. The method includes the steps of attaching at least one microelectronic element to a tape having upper terminals projecting upwardly from an upper surface of a dielectric layer, so that top surfaces of the terminals are disposed coplanar with or above a top surface of the microelectronic element after the attaching step, electrically connecting the microelectronic element to at least some of the upper terminals; and further includes the step of applying an encapsulant to cover at least a portion of the upper surface of the dielectric layer, leaving the upper terminals surfaces of the terminals exposed.
摘要:
A microelectronic package is made by a process which includes folding a substrate. Alignment elements on different parts of the substrate engage one another during the folding process to position the parts of the substrate precisely relative to one another. One or more of the alignment elements may be a mass of an overmolding encapsulant covering a chip.