摘要:
Embodiments of a semiconductor device that includes a semiconductor substrate and a cavity disposed in the semiconductor substrate that extends at least from a first side of the semiconductor substrate to a second side of the semiconductor substrate. The semiconductor device also includes an insulation layer disposed over the first side of the semiconductor substrate and coating sidewalls of the cavity. A conductive layer including a bonding pad is disposed over the insulation layer. The conductive layer extends into the cavity and connects to a metal stack disposed below the second side of the semiconductor substrate. A through silicon via pad is disposed below the second side of the semiconductor substrate and connected to the metal stack. The through silicon via pad is position to accept a through silicon via.
摘要:
Embodiments of an image sensor pixel that includes a photosensitive element, a floating diffusion region, and a transfer device. The photosensitive element is disposed in a substrate layer for accumulating an image charge in response to light. The floating diffusion region is dispose in the substrate layer to receive the image charge from the photosensitive element. The transfer device is disposed between the photosensitive element and the floating diffusion region to selectively transfer the image charge from the photosensitive element to the floating diffusion region. The transfer device includes a buried channel device including a buried channel gate disposed over a buried channel dopant region. The transfer device also includes a surface channel device including a surface channel gate disposed over a surface channel region. The surface channel device is in series with the buried channel device. The surface channel gate has the opposite polarity of the buried channel gate.
摘要:
Embodiments of an apparatus comprising a pixel array comprising a plurality of macropixels. Each macropixel includes a pair of first pixels each including a color filter for a first color, the first color being one to which pixels are most sensitive, a second pixel including a color filter for a second color, the second color being one to which the pixels are least sensitive and a third pixel including a color filter for a third color, the third color being one to which pixels have a sensitivity between the least sensitive and the most sensitive, wherein the first pixels each occupy a greater proportion of the light-collection area of the macropixel than either the second pixel or the third pixel. Corresponding process and system embodiments are disclosed and claimed.
摘要:
A backside illuminated (“BSI”) complementary metal-oxide semiconductor (“CMOS”) image sensor includes a photosensitive region disposed within a semiconductor layer and a stress adjusting layer. The photosensitive region is sensitive to light incident on a backside of the BSI CMOS image sensor to collect an image charge. The stress adjusting layer is disposed on a backside of the semiconductor layer to establish a stress characteristic that encourages photo-generated charge carriers to migrate towards the photosensitive region.
摘要:
An image sensor pixel includes a substrate, a first epitaxial layer, a collector layer, a second epitaxial layer and a light collection region. The substrate is doped to have a first conductivity type. The first epitaxial layer is disposed over the substrate and doped to have the first conductivity type as well. The collector layer is selectively disposed over at least a portion of the first epitaxial layer and doped to have a second conductivity type. The second epitaxial layer is disposed over the collector layer and doped to have the first conductivity type. The light collection region collects photo-generated charge carriers and is disposed within the second epitaxial layer. The light collection region is also doped to have the second conductivity type.
摘要:
A technique for fabricating an image sensor including a pixel circuitry region and a peripheral circuitry region includes fabricating front side components on a front side of the image sensor. A dopant layer is implanted on a backside of the image sensor. A anti-reflection layer is formed on the backside and covers a first portion of the dopant layer under the pixel circuitry region while exposing a second portion of the dopant layer under the peripheral circuitry region. The first portion of the dopant layer is laser annealed from the backside of the image sensor through the anti-reflection layer. The anti-reflection layer increases a temperature of the first portion of the dopant layer during the laser annealing.
摘要:
A method of fabricating a backside illuminated imaging sensor that includes a device layer, a metal stack, and an opening is disclosed. The device layer has an imaging array formed in a front side of the device layer, where the imaging array is adapted to receive light from a back side of the device layer. The metal stack is coupled to the front side of the device layer and includes at least one metal interconnect layer having a metal pad. The opening extends from the back side of the device layer to the metal pad to expose the metal pad for wire bonding. The method includes depositing a film on the back side of the device layer and within the opening, then etching the film to form a frame within the opening to structurally reinforce the metal pad.
摘要:
An image sensor includes a substrate having a surface at which incident light is received. A pixel array is formed over and within the substrate. The pixel array includes a first and a second pixel arranged to receive light of different colors. The first pixel includes a photosensitive region formed in the substrate and has a first anti-reflective coating (ARC) layer formed over the photosensitive region. The first ARC layer has a first thickness that produces destructive interference above the first ARC layer in response to the incident light. The second pixel includes a photosensitive region formed in the substrate, and a second ARC layer formed over the photosensitive region that produces destructive interference above the second ARC layer in response to the incident light.
摘要:
A backside illuminated imaging sensor includes a semiconductor substrate, a metal interconnect layer and a light attenuating layer. The semiconductor substrate has a front surface, a back surface, and includes at least one imaging pixel formed on the front surface of the semiconductor substrate. The metal interconnect layer is electrically coupled to the imaging pixel and the light attenuating layer is coupled between the metal interconnect layer and the front surface of the semiconductor substrate. In operation, the imaging pixel receives light from the back surface of the semiconductor substrate, where a portion of the received light propagates through the imaging pixel to the light attenuating layer. The light attenuating layer is configured to substantially attenuate the portion of light received from the imaging pixel.
摘要:
A backside illuminated imaging sensor includes a semiconductor layer and an infrared detecting layer. The semiconductor layer has a front surface and a back surface. An imaging pixel includes a photodiode region formed within the semiconductor layer. The infrared detecting layer is disposed above the front surface of the semiconductor layer to receive infrared light that propagates through the imaging sensor from the back surface of the semiconductor layer.