Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1999-03-31
2001-05-08
Gaffin, Jeffrey (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S783000, C361S748000, C361S760000, C361S679090, C361S689000, C361S689000, C174S260000, C174S266000, C257S080000, C257S081000, C257S084000, C257S098000, C385S093000, C385S054000
Reexamination Certificate
active
06229712
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to printed circuit boards in general, and in particular to a printed circuit board to be utilized in an optoelectric data processing system. Still more particularly, the present invention relates to a printed circuit board for coupling surface mounted semiconductor optoelectric devices within an optoelectric computer system.
2. Description of the Prior Art
Within most computer systems, a bus (or a group of buses) is typically the primary vehicle by which communication among electronic components takes place. Although there are different types of buses, in its most basic form, each bus is simply a series of electrical wires interconnecting various electronic components within a computer system. The electrical transmission characteristics of a bus are defined by the material properties of the bus, the physical geometry of the components, the clock speed of the signals, and the noise within the bus. Thus, both the limitations in materials and the limitations in electronic components contribute to the electrical transmission characteristics of a bus.
As computer systems become more complex, there is a continuing need to drive signals within a bus at a faster clock rate while at the same time minimizing power, noise, and electromagnetic interference. Most if not all of these requirements are met with the advent of optoelectric computer systems. An optoelectric computer system is a computer system in which digital data signals are transmitted in both electrically conductive buses and optical buses (or pathways). Such computer systems may, for example, utilize semiconductor devices that have vertical cavity surface emitting lasers (VCSELs) serving as transducers for optoelectric exchange. One such semiconductor device that is now in commercial use is the HFBR-5303 VCSEL transceiver manufactured by Hewlett Packards. In order to accommodate such devices and therefore benefit from the higher data transfer rates available through optoelectric devices, the present invention provides an improved printed circuit board that supports surface mounted optoelectric semiconductor devices.
SUMMARY OF THE INVENTION
In accordance with a preferred embodiment of the present invention, a printed circuit board includes at least one substantially planar surface. There are multiple electrically conductive sites located on the substantially planar surface for connection to a surface mounted semiconductor electronic device. The electrically conductive sites are also connected to electrical interconnects embedded within the printed circuit board. In addition, there are multiple optical pathways terminated at the substantially planar surface for coupling to a surface mounted semiconductor optoelectric device.
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McConnell Daniel
Munoz-Bustamante Carlos
Dillon Andrew
Foster David
Gaffin Jeffrey
Grosser George E.
International Business Machines - Corporation
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