Resources Contact Us Home
Method of Manufacturing a multi-layer circuit board

Image Number 10 for United States Patent #6687985.

A multilayer wiring board comprising a mother wiring board and a carrier wiring board, in which all of the composing layers have IVH structure. The mother wiring board (11) is formed in the manner that a plurality of resin-impregnated-fiber-sheets having mother wiring layers (13) and first inner-via-hole conductors (14) for connecting the wiring layers (13) each other are laminated. The mother wiring board (11) comprises a base board (11a) and container board (11b) having an opening for forming a cavity (15). The carrier wiring board (16) has lands (17) for mounting LSI bare chips, wirings (18), a plurality of carrier-board-wiring-layers (19) and second inner-via-hole conductors (20) for connecting the wiring layers (19) each other. The carrier wiring board (16) is set in the cavity (15) for electrically connecting the carrier wiring board (16) to the mother wiring board (11) by connecting carrier board electrodes (21) to mother board electrodes (22) through connectors (23) of solder balls, gold bumps or electrically conductive paste. The carrier wiring board (16) has higher wiring density at the portion where LSI bare chips are mounted, than the mother wiring board.

  Recently Added Patents
Washing machine
Bessel beam plane illumination microscope
Secure mobile ad hoc network
Method and system for testing indirect bandgap semiconductor devices using luminescence imaging
Method and apparatus for reacquiring lines in a cache
Method of manufacturing pipe with branch
Multi-wired antenna for mobile apparatus
  Randomly Featured Patents
High center of gravity stable pneumatic isolator
Temperature-based clock frequency controller apparatus and method
Portable interference-generating device for use in a CDMA mobile testing
Methods and compositions to inhibit edema factor and adenylyl cyclase
Color head for offset press
Pole holding member in connector
Method and apparatus for removing prosthetic cement
Display device with an improved contact hole arrangement for contacting a semiconductor layer through an insulation film
Low k film application for interlevel dielectric and method of cleaning etched features
Beach trolling device