1. A multilayer printed wiring board comprising:
a core board;
a build-up layer that is formed on the core board and has a conductor pattern formed on the upper surface thereof;
a resin layer comprising a hardened film formed on the build-up layer and formed by hardening a resin composition comprising an epoxy resin, a phenol resin, cross-linked rubber particles and a hardening catalyst;
a mounting electrode for mounting an electrical part provided on the upper surface of the resin layer; and
a conductor post penetrating through the resin layer for electrically connecting the mounting electrode to the conductor pattern,
wherein the resin composition comprises 5 to 100 parts by weight of the phenol resin, 5 to 200 parts by weight of the cross-linked rubber particles and 0.1 to 20 parts by weight of the hardening catalyst with respect to 100 parts by weight of the epoxy resin, the cross-linked rubber particles have a glass-transition temperature in a range between \u221280\xb0 C. to \u221220\xb0 C., and the resin composition has a glass-transition temperature in a range between 100\xb0 C. to 200\xb0 C.
2. The multilayer printed wiring board according to claim 1, wherein the resin composition contains phenol resin of 10 to 50 parts by weight, cross-linked rubber particles of 7 to 180 parts by weight and a hardening catalyst of 0.5 to 10 parts by weight with respect to epoxy resin of 100 parts by weight.
3. The multilayer printed wiring board according to claim 1, wherein the conductor post has the aspect ratio Rasp of not less than 4 and less than 20.
4. The multilayer printed wiring board according to claim 1, wherein the conductor post has the diameter of 30 \u03bcm or more.
5. The multilayer printed wiring board according to claim 1, wherein the conductor post is designed to have a constricted shape.
6. The multilayer printed wiring board according to claim 5, the ratio of the diameter of the thickest part of the conductor post to the diameter of the narrowest part of the conductor post is 2 or more.
7. The multilayer printed wiring board according to claim 5, wherein the minimum diameter of the conductor post is more than 30 \u03bcm and not more than 60 \u03bcm.
8. The multilayer printed wiring board according to claim 1, wherein the mounting electrode is the apex portion of the conductor post that is formed on the substantially same plane as the upper surface of the resin layer.
9. The multilayer printed wiring board according to claim 1, wherein the resin layer has a Young’s modulus of 10 MPa to 1 GPa at 30\xb0 C.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A vibration gyro sensor, comprising:
a vibrating element;
a pair of drive electrodes for driving the vibrating element;
at least two detection electrodes for detecting Coriolis force applied to the vibrating element;
a monitor circuit coupled with one of the pair of drive electrodes, so as to output a monitor signal;
a drive circuit for amplifying the monitor signal so as to output an amplified signal to the other of the pair of drive electrodes;
a differential amplifier circuit for differentially amplifying at least two signals obtained from the detection electrodes of the vibrating element, so as to output a differential amplified signal;
a synchronous detection circuit for synchronously detecting the differential amplified signal with respect to the monitor signal, so as to output a detected signal;
a filter circuit for outputting a filtered signal in which a noise of the detected signal is removed; and
a ratiometric circuit which receives the filtered signal and outputs a sensitivity signal whose amplitude is proportional to variation of a power voltage.
2. The vibration gyro sensor according to claim 1, wherein the ratiometric circuit and a circuit which is previous to the filter circuit receive a common power source.
3. The vibration gyro sensor according to claim 2, wherein the filter circuit is a passive low-pass filter.
4. A vibration gyro sensor, comprising:
a vibrating element;
a pair of drive electrodes for driving the vibrating element;
at least two detection electrodes for detecting Coriolis force applied to the vibrating element;
a monitor circuit coupled with one of the pair of drive electrodes, so as to output a monitor signal;
a drive circuit for amplifying the monitor signal so as to output an amplified signal to the other of the pair of drive electrodes;
a differential amplifier circuit for differentially amplifying at least two signals obtained from the detection electrodes of the vibrating element, so as to output a differential amplified signal;
a synchronous detection circuit for synchronously detecting the differential amplified signal with respect to the monitor signal, so as to output a detected signal;
a filter circuit for outputting a filtered signal in which .a noise of the detected signal is removed; and
a ratiometric circuit which receives the filtered signal and outputs a sensitivity signal whose amplitude is proportional to variation of a power voltage;
a first power circuit for supplying a first power source to the filter circuit;
a second power circuit for supplying a second power source to the ratiometric circuit;
a first reference voltage generation circuit which receives the first power source and supplies a first reference voltage to a circuit being previous to the ratiometric circuit; and
a second reference voltage generation circuit which receives the second power source and supplies a second reference voltage to the ratiometric circuit.
5. The vibration gyro sensor according to claim 4, wherein the filter circuit is an active low-pass filter driven by the first power source.
6. The vibration gyro sensor according to claim 1, wherein the vibrating element is a double-T shaped vibrating element.
7. The vibration gyro sensor according to claim 1, wherein the filter circuit includes an n-th order filter, where n is greater than or equal to 2.
8. The vibration gyro sensor according to claim 1, wherein the filter circuit is immediately previous to the ratiometric circuit.
9. The vibration gyro sensor according to claim 1, wherein the ratiometric circuit includes a multiplier.
10. The vibration gyro sensor according to claim 1, further comprising a voltage generation circuit that generates a reference voltage based on the power voltage,
wherein the reference voltage is proportional to the power voltage; and
wherein the ratiometric circuit multiplies the reference voltage by an amplitude of the filtered signal to generate the sensitivity signal.