摘要:
Via holes are formed in an electrically conductive power plane. Photo-imageable dielectric (PID) material is applied to one side of the power plane filling the via holes. The power plane side with no PID material is exposed to light energy to cure the PID material in the via holes. A developer is used to remove any uncured PID material. Signal plane assemblies comprising a conductive signal plane and a dielectric layer are laminated onto the filled power plane forming a two signal and one power plane (2S1P) structure. In another embodiment, the power plane has PID material applied from both sides. A photo-mask is applied to the power plane and the PID material in the via holes is cured with light energy. A developer is used to remove uncured PID material. Signal plane assemblies, as described above, are laminated onto the filled power plane forming a 2S1P structure.
摘要:
A structure of and method for producing a multilayer printed or wiring circuit board, and more particularly a method producing so-called z-axis or multilayer electrical interconnections in a hierarchial wiring structure in order to be able to provide for an increase in the number of inputs and outputs (I/O) in comparison with a standard printed wiring board (PWB) arrangement, and a printed wiring board produced by the method.
摘要:
A roof drill bit having a tool body with a cutting insert brazed thereto. The cutting insert has opposite leading and trailing face portions joined by a side surface which has a leading side relief portion adjacent the leading face portion and a trailing side relief portion adjacent the trailing face portion. The trailing side relief portion, which extends from the leading face portion a distance equal to between about one-third to two-thirds the thickness of the insert, has a greater relief angle that the leading side relief portion, which extends from the trailing face portion a distance equal to between about one-third to about two-thirds the thickness of the insert.
摘要:
A binding line including at least first and second binding line sections. The first binding line section is adapted to transport books therealong to a book exit station and the second binding line section is adapted to transport books therealong from a book entry station. The binding line includes a book transferring mechanism or subsystem for moving books from the book exit station of the first binding line section to the book entry station of the second binding line section as well as devices associated with book leaving the book exit station and books entering the book entry station for tracking books during transfer from the first binding line section to the second binding line section. The first binding line section can run at the same or a different speed than the second binding line section. In addition, the binding line can include asynchronous or synchronous multiple first and/or second binding line sections.
摘要:
A coal seam is degasified in advance of its being mined by drilling one or more generally horizontal holes from a working face into the seam, and placing a particulate propping agent into the borehole to maintain its integrity.
摘要:
An improved conference calling system that operates to correlate a conference call with other conference calls, along with collateral information pertinent to the conference call, and deliver the correlated information to conference call participants or other entities. When setting up a conference call, a reservation system interface enables a user to not only schedule the conference call, but to also enter information that can be used to (a) correlate the instance conference call with previous or future conference calls, (b) set up for the recordation of the conference call, (c) set up for the delivery of the recorded conference call through one or more media channels, and (d) provide the recorded conference call as well as any related collateral and correlated conference calls to various parties.
摘要:
A method of making a circuitized substrate assembly in which two or more subassemblies are aligned and bonded together. The bonding, preferably using lamination, results in effective electrical connections being formed between respective pairs of conductors of the subassemblies in such a manner that the metallurgies of the conductors, and those of an interim metallic solder paste, are effectively mixed and the flowable interim dielectric used between the mating subassemblies is forced to flow to engage and surround the conductor coupling, without adversely affecting the electrical connection formed.
摘要:
A layer for use in a modular assemblage for supporting ICES is formed with metal contacts for assembly by making a sandwich of metal interconnect members between two layers of dielectric; drilling holes through the dielectric, stopping on a metal layer bonded to the bottom surface of the module; forming blind holes stopping on the interconnect members; and plating metal through the volume of the via, both full and blind holes, thereby forming vertical and horizontal connections in a layer that be stacked to form complex interconnect assemblies.
摘要:
A method of making a circuitized substrate in which a commoning layer is used to form multiple, substantially vertically aligned conductive openings in a multilayered component such as a laminate interposer for coupling a chip to a printed circuit board or the like. The structure, including such a chip and circuit board is ideally suited for use within an information handling system.
摘要:
A colloidal metal seed formulation useful for catalytically activating a surface of a non-conductive dielectric substrate in an electroless plating process is provided. The colloidal metal seed formulation includes stannous chloride, palladium chloride, HCl and a surfactant selected from a diphenyloxide disulfonic acid or alkali or alkaline earth metal salt thereof, C30H50O10, an alcohol alkoxylate and mixtures thereof. A method of electroless plating of a conductive metal onto a non-conductive dielectric substrate using the colloidal metal seed formulation is also provided.