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 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 method is disclosed of simultaneously laminating circuitized dielectric layers to form a multilayer high performance circuit board and making interlevel electrical connections. The method selects two elements which will form a eutectic at one low temperature and will solidify to form an alloy which will only remelt at a second temperature higher than any required by any subsequent lamination. The joint is made using a transient liquid bonding technique and sufficient Au and Sn to result in a Au--Sn20wt% eutectic at the low temperature. Once solidified, the alloy formed remains solid throughout subsequent laminations. As a result, a composite, mulilayer, high performance circuit board is produced, electrically joined at selected lands by the solid alloy.
摘要:
Improved vie-filling compositions for producing conductive vias in circuitized ceramic substrates, particularly multi-layer 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:
Fluorinated polymeric composition exhibiting low dielectric constant and a low coefficient of thermal expansion containing a fluorinated polymeric material and a silica and/or quartz filler having a mean particle size of no greater than 7 microns, and use thereof to form a substrate having vias therein. Layers of the above composition are obtained by applying the composition to a substrate and then heating the composition to a temperature sufficient to cause the composition to fuse.
摘要:
A reaction product of a .beta.-diketone and a polymer having groups that are reactive with the .beta.-diketone can be complexed with a metal. The reaction product having the complex metal can be activated to provide a substrate suitable for plating from an electroless metal plating bath.