Title: Printed circuit board for real-time clock IC and manufacturing method for printed circuit board for real-time clock IC
Application Number: 200610121835 Application Date: 2006.08.24
Publication Number: 1921293 Publication Date: 2007.02.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/32
Applicant(s) Name: Tokyo Shibaura Electric Co. Address:
Inventor(s) Name: Funato Yasuo
Attorney & Agent: yang xiaoguang li zheng
Abstract:
    According to one embodiment, a printed circuit board for a real-time clock IC includes a plurality of wiring layers sequentially laminated to form one substrata and including at least one layer which forms an oscillator circuit pattern having a crystal oscillator generating a reference signal and an oscillation stabilizing portion which stabilizes and oscillates the reference signal and adjusts the oscillation frequency to a target frequency, and a power supply layer arranged in at least one of a position between the plurality of wiring layers and front and rear surfaces of the substrate, and forming a power supply circuit pattern which supplies electric power to a circuit on the substrate and removing a portion of the power supply circuit pattern which has width not smaller than width of the oscillator circuit pattern in a portion of the power supply circuit pattern which overlaps with the oscillator circuit pattern.
Time: 11
<- Previous Patent:Integrated circuit package with g...   |  Next Patent:Crystal oscillator ->