公开(公告)号：BR9912939A

公开(公告)日：2005-04-12

申请号：BR9912939

申请日：1999-08-12

Applicant: INFINEON TECHNOLOGIES AG

Inventor： BASSE PAUL-WERNER VON ,  WILLER JOSEF ,  SCHEITER THOMAS ,  MARKSTEINER STEPHAN

IPC: G01B7/28 ,  A61B5/117 ,  G06K7/08 ,  G06K9/00 ,  G06T1/00 ,  H01L31/00

Abstract: A grid-shaped array of conductor areas is used for capacitive image acquisition. Shielding conductors are disposed in each case between the conductors that are provided for measurement. During a plurality of charging and discharging cycles, the potential is always carried along on the conductors belonging to a respective pixel in order to prevent displacement currents between the shielding capacitors. By way of example, a compensation line with a feedback operational amplifier can be used for identically altering the electrical potentials on the conductors.

公开(公告)号：DE19939094C1

公开(公告)日：2001-09-27

申请号：DE19939094

申请日：1999-08-18

Applicant: INFINEON TECHNOLOGIES AG

Inventor： GRESCHITZ MANFRED ,  GRUBER KLAUS ,  HELMINGER FRANZ ,  WOLF FRANZ ,  BASSE PAUL-WERNER VON

IPC: G01C9/06 ,  G01C9/20 ,  B81B3/00

公开(公告)号：BR9911980A

公开(公告)日：2001-03-27

申请号：BR9911980

申请日：1999-07-01

Applicant: INFINEON TECHNOLOGIES AG

Inventor： WILLER JOSEF ,  BASSE PAUL-WERNER VON ,  SCHEITER THOMAS

IPC: A61B5/117 ,  G06K9/00 ,  G06T1/00 ,  H01L21/312 ,  H01L21/314 ,  H01L29/94

Abstract: A semiconductor component with passivation includes at least two double passivating layers, of which an uppermost is applied to a planar surface of a layer located therebelow. The double passivating layers include two layers of different dielectric materials, for example silicon oxide and silicon nitride. The respective thicknesses of the individual passivating layers can be adapted to dimensions of the structuring of the layer to which the passivation is applied. This produces a reliable passivation which is particularly suitable for capacitively measuring fingerprint sensors.

公开(公告)号：BR9912364A

公开(公告)日：2001-06-05

申请号：BR9912364

申请日：1999-07-01

Applicant: INFINEON TECHNOLOGIES AG

Inventor： BASSE PAUL-WERNER VON ,  WILLER JOSEF

IPC: G01B7/28 ,  A61B5/06 ,  G01B7/34 ,  G01R27/26 ,  G06K9/00 ,  G06T1/00

Abstract: A grid of capacitor surfaces is connected to read lines and control lines. The read lines are connected alternately to the output of a feedback operational amplifier and to a collecting capacitor. The capacitances to be measured are charged repeatedly and the charges are collected on the collecting capacitors. Between the charging operations, the potential on the read lines is kept constant through the use of the low-resistance output of the operational amplifier. The use of this method in the case of a fingerprint sensor makes it possible to evaluate all the read lines together.