Passive element circuit

H - Electricity – 01 – L

Patent

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Details

H01L 23/66 (2006.01) H01L 21/66 (2006.01) H01L 21/70 (2006.01) H01L 27/01 (2006.01) H03G 9/24 (2006.01) H03H 7/03 (2006.01) H03H 7/38 (2006.01) H03H 7/46 (2006.01) H03H 11/24 (2006.01)

Patent

CA 2239277

A passive element circuit is formed by a spiral inductor, a high-dielectric-constant thin-film capacitor, a via hole, and a bonding pad. By using SrTiO3 as the high-dielectric-constant thin-film, which exhibits a dielectric constant of 200 up to a frequency of 20 GHz, it is possible to achieve a reduction of the capacitor surface area to approximately 1/30 of the area formerly required when using a SiNX (dielectric constant up to 6.5). Two high-dielectric-constant thin-film capacitors, a via hole for grounding, and a bonding pad are disposed at the center, which are surrounded by the spiral inductor. To connect the two high-dielectric-constant thin-film capacitors are joined in series, they are formed on one high-dielectric-constant thin-film. A lead from the spiral inductor is made by a metal wire from the bondinq pad at the center.

L'invention est un circuit à élément passif qui est constitué d'une inductance spirale, d'un condensateur en couches minces à grande constante diélectrique, d'un trou de traversée et d'un plot de connexion. En utilisant le SrTiO3 pour les couches minces à grande constante diélectrique, lequel a une constante diélectrique de 200 jusqu'à la fréquence de 20 GHz, on peut réduire l'aire de la surface du condensateur à 1/30 de l'aire nécessaire antérieurement avec un composé du type SiNX (ayant une constante diélectrique ne dépassant pas 6,5). Deux condensateurs en couches minces à grande constante diélectrique, un trou de traversée pour la mise à la masse et un plot de connexion sont placés au centre et entourés de l'inductance spirale. Les deux condensateurs en couches minces à grande constante diélectrique sont formés sur une même couche mince à grande constante diélectrique, ce qui permet de les connecter en série. Le conducteur de connexion de l'inductance spirale est constitué par un fil métallique partant du plot de connexion central.

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