Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer ceramic capacitor with an interposer which is capable of suppressing noise associated with an electrostriction phenomenon.SOLUTION: A multilayer ceramic capacitor with an interposer comprises: an interposer 20 equipped with an insulated substrate 21, two first conductor pads 22, two second conductor pads 23, and two conductor vias 24 which connect the first conductor pads 22 with the second conductor pads 23; and a multilayer ceramic capacitor 10 having external electrodes 12 which are connected via solder SOL to the first conductor pads 22 of the interposer 20. Each of the conductor vias 24 of the interposer 20 has a through-hole 24a therein, and a gap GA not filled with the solder SOL is formed on the second conductor pad 23 side of the through-hole 24a.
Abstract:
PROBLEM TO BE SOLVED: To obtain a flexible board capable of achieving a low reflection connection with a printed wiring board, and to obtain a board connection structure using the same.SOLUTION: The flexible board comprises a terminal part for obtaining electrical connection with a printed wiring board. The terminal part has: a first signal pad 1 formed on a first conductor layer 51 and electrically isolated from a ground layer 2; a pair of first ground pads 3 formed on the first conductor layer 51 so as to sandwich the first signal pad 1 therebetween and connected to the ground layer 2; a second signal pad 5 formed on a second conductor layer 52 and connected to a signal line 4; a pair of second ground pads 6 formed on the second conductor layer 52 so as to sandwich the second signal pad 5 therebetween and electrically isolated from the signal line 4; a third signal pad 7 formed on a third conductor layer 53; and a pair of third ground pads 8 formed on the third conductor layer 53 so as to sandwich the third signal pad 7 therebetween. The second signal pad 5 is wider than the third signal pad 7.
Abstract:
In a semiconductor chip in which LDMOSFET elements for power amplifier circuits used for a power amplifier module are formed, a source bump electrode is disposed on an LDMOSFET formation region in which a plurality of source regions, a plurality of drain regions and a plurality of gate electrodes for the LDMOSFET elements are formed. The source bump electrode is formed on a source pad mainly made of aluminum via a source conductor layer which is thicker than the source pad and mainly made of copper. No resin film is interposed between the source bump electrode and the source conductor layer.
Abstract:
Provided herein are devices comprising a printed wiring board that comprise, singulated capacitors fabricated from known good, thin-film, fired-on-foil capacitors. Provided are methods of incorporating the singulated capacitors into the build-up layers of a printed wiring board to minimize impedance. The singulated capacitors have a pitch that allows each power and ground terminal of an IC to be directly connected to a power and ground electrode, respectively, of its own singulated capacitor. Using a feedstock of known good, fired-on-foil capacitors allows for improved PWB yield.
Abstract:
PROBLEM TO BE SOLVED: To reinforce a solder connection part of a spring terminal in a substrate with the spring terminal.SOLUTION: A substrate with a spring terminal includes: a substrate 10 including connection pads P; spring terminals 30, each of which has a connection part 32 connected with the connection pad P by a solder layer 22; and reinforcement resin parts 24 which are formed so as to cover side surfaces of the solder layer 22. The solder layers 22 and the reinforcement resin parts 24 are formed by a resin-containing solder paste.