-
公开(公告)号：DE68917694D1
公开(公告)日：1994-09-29
申请号：DE68917694
申请日：1989-11-03
Applicant: IBM
Inventor： COSIMANO RAYMOND JOSEPH , TOMEK REINHOLD ERNST
Abstract: A circuit assembly (10) (e.g., printed circuit board) including an insulative substrate (13) having opposed surfaces (15, 17) each defining a walled opening (25) therein. Each walled opening includes a layer (31) of conductive material (e.g., copper) plated thereon, these openings being electrically connected through a common channel (35) or the like, which channel in turn has been plated to include copper material therein. Located within each opening is a compliant contact pin (41, 43) including a compliant end portion (45) designed to provide an interference fit within one of the respective openings and an extending portion (61) designed for extending from the board's outer surfaces to be electrically connected to a designated external component (e.g., printed circuit board, wiring, conductive socket). Utilization of opposed pins, walled openings, and a narrow channel as defined herein allows the greater utilization of board internal volume to thus accommodate higher circuit densities particularly in the areas of the insulative board between the spaced apart, plated openings.
-
公开(公告)号：DE68917694T2
公开(公告)日：1995-03-30
申请号：DE68917694
申请日：1989-11-03
Applicant: IBM
Inventor： COSIMANO RAYMOND JOSEPH , TOMEK REINHOLD ERNST
Abstract: A circuit assembly (10) (e.g., printed circuit board) including an insulative substrate (13) having opposed surfaces (15, 17) each defining a walled opening (25) therein. Each walled opening includes a layer (31) of conductive material (e.g., copper) plated thereon, these openings being electrically connected through a common channel (35) or the like, which channel in turn has been plated to include copper material therein. Located within each opening is a compliant contact pin (41, 43) including a compliant end portion (45) designed to provide an interference fit within one of the respective openings and an extending portion (61) designed for extending from the board's outer surfaces to be electrically connected to a designated external component (e.g., printed circuit board, wiring, conductive socket). Utilization of opposed pins, walled openings, and a narrow channel as defined herein allows the greater utilization of board internal volume to thus accommodate higher circuit densities particularly in the areas of the insulative board between the spaced apart, plated openings.
-
公开(公告)号：AU8718675A
公开(公告)日：1977-06-09
申请号：AU8718675
申请日：1975-12-02
Applicant: IBM
Inventor： DEMAIN FRANK JOHN , SMITH NORMAND COY , PELKIE ROBERT ELDEN , TOMEK REINHOLD ERNST
Abstract: 1483435 Ink drop producing INTERNATIONAL BUSINESS MACHINES CORP 5 Sept 1975 [18 Dec 1974] 36568/75 Heading B6P An apparatus for causing perturbations in a liquid stream to produce successive drops comprises a nozzle unit 10 having a chamber, to which liquid is supplied under pressure, the chamber having a wall 12 with an orifice 13 which is repetitively altered in cross-section. A piezoelectric crystal transducer 15, connected to a signal generator 18, acts on the orifice 13. Several nozzles may be linearly arranged to be supported between two planar transducers.
-
公开(公告)号：DE2554499A1
公开(公告)日：1976-07-01
申请号：DE2554499
申请日：1975-12-04
Applicant: IBM
Inventor： DEMAINE FRANK JOHN , PELKIE ROBERT ELDEN , SMITH NORMAND COY , TOMEK REINHOLD ERNST
Abstract: 1483435 Ink drop producing INTERNATIONAL BUSINESS MACHINES CORP 5 Sept 1975 [18 Dec 1974] 36568/75 Heading B6P An apparatus for causing perturbations in a liquid stream to produce successive drops comprises a nozzle unit 10 having a chamber, to which liquid is supplied under pressure, the chamber having a wall 12 with an orifice 13 which is repetitively altered in cross-section. A piezoelectric crystal transducer 15, connected to a signal generator 18, acts on the orifice 13. Several nozzles may be linearly arranged to be supported between two planar transducers.
-
-
-
Search Results
4
records
(took 0.017 seconds)
