Abstract:
An image sensor including a pixel assembly, each pixel including a photodiode and an access transistor connected to a read circuit, the photodiode and the access transistor being formed in and above a first semiconductor substrate, all or part of the read circuit being formed in a second semiconductor substrate, the second substrate being placed above the first substrate and separated therefrom by an intermediary insulating layer covering the access transistor, the photodiode receiving incident photons on its lower surface side opposite to the intermediary insulating layer.
Abstract:
An image sensor including a pixel assembly, each pixel including a photodiode and an access transistor connected to a read circuit, the photodiode and the access transistor being formed in and above a first semiconductor substrate, all or part of the read circuit being formed in a second semiconductor substrate, the second substrate being placed above the first substrate and separated therefrom by an intermediary insulating layer covering the access transistor, the photodiode receiving incident photons on its lower surface side opposite to the intermediary insulating layer.
Abstract:
A charge transfer memory and its fabrication method are disclosed. The memory has charge transfer shift registers, with four phases and two level of electrodes, and a reading register with two phases and three levels of electrodes. At one end of each shift register, there is a final electrode contiguous with a reading storage electrode of the reading register, which is itself contiguous to a reading transfer electrode. These electrodes are made in a layer, with a second type of doping, of a semiconductor substrate with a first type of doping. Zones with a third type of doping are made facing the transfer electrodes of the reading register. According to the invention, facing the final electrode of each shift register, a zone with a fourth type of doping is made. This zone with a fourth type of doping prevents charges flowing in the reading register from returning to a shift register.
Abstract:
Disclosed are a charge-coupled device with lowering of output potential as well as a method for the fabrication of this device. In a known way, the device comprises, upstream on a semiconducting substrate with a first type of doping (P), a semiconducting layer with a second type of doping (N) and an insulating layer covering the former layer. Pairs of electrodes are formed on the insulating layer. Each pair has a transfer electrode and a storage electrode. Zones with a third type of doping N.sup.+) are made in the layer of a second type (N). A layer with a third type of doping (N.sup.-) is made downstream, in the layer with a second type of doping, and, downstream, there is formed at least one other pair of additional transfer and storage electrodes. A zone with a fourth type of doping (N.sup.--) is made beneath the additional transfer electrode in the layer with a third type of doping (N.sup.-). This pair of additional electrodes and the zone with a fourth type of doping make it possible to obtain the lowering of transfer potential at output.
Abstract:
A method for controlling a photosensitive cell including a photodiode connected to a read node via a MOS transfer transistor, the read node being connected to a source of a reference voltage via a MOS reset transistor, cyclically including a waiting phase at the end of which the photodiode is isolated from the reference voltage; an integration phase during which the voltage of the photodiode varies from a reset voltage to a useful voltage that depends on the lighting; and a phase of reading a voltage representative of the useful voltage, wherein the isolation of the photodiode of the read node at the end of the waiting phase includes the steps of setting the transfer transistor to the on state, the reset transistor being off; turning off the transfer transistor; and setting the reset transistor to the on state.
Abstract:
The detector of visible and near-infrared radiation comprises a near-infrared photosensitive element, a readout circuit for reading the near-infrared photosensitive element, four visible photosensitive elements, one of which being placed facing the near-infrared photosensitive element, and four pigmented resin filters to define a pixel quadruplet. A first pixel, including the near-infrared photosensitive element and one of the visible photosensitive elements, is provided with a resin filter opaque to visible radiation. The three other pixels, respectively including the three other visible photosensitive elements, are respectively provided with filters associated with the three primary colors.
Abstract:
An imaging device including: plural pixels each including a photodetector; plural reading circuits associated with the plural photodetectors, each reading circuit including a first MOS transistor charging/discharging a photodetector and a second MOS transistor converting charges to be output by the photodetector into voltage; an electronic processing circuit configured to process the voltages outputted by the reading circuits; a first substrate on which are formed the pixels and the reading circuits, and a second substrate, distinct from the first substrate, on which is formed the electronic processing circuit, the second substrate being linked electrically to the first substrate by an electrical interconnection forming an electrical link between the reading circuits and the electronic processing circuit.
Abstract:
An analog image memory device using charge transfer and comprising:a memory zone of N lines of M memory points, each memory point being formed by the integration on the same semiconductor substrate of an MIS capacity separated from a diode by a screen grid,means for selecting each memory point,means for writing in each memory point a charge amount corresponding to the analog signal to be stored andmeans for reading the memory zone line by line after writing.
Abstract:
The present invention concerns an analysis process of a line transfer photosensitive device.The charge-signal and the charge noise transfers from the columns towards the memory have the same duration and are made by using a same training charge, stored in memory, that must be at least sufficient to allow to pass in high inversion at the beginning of the transfer from the columns towards the memory. The transfers of the charge-signal and the charge-noise from the memory towards the read-out register or the drain have the same duration and are made by using training charges at least sufficient to allow to pass in high inversion at the beginning of the transfer. These training charges are read with the charge-signal or collected with the charge-noise.
Abstract:
A device for controlling an image sensor including at least one photosensitive cell including a photodiode capable of discharging into a sense node via a first MOS transistor, the sense node being connected to the gate of a second MOS transistor having its source connected to a processing system. The device includes a bias circuit capable of increasing the voltage of the source during the discharge of the photodiode into the sense node.