Abstract:
A structure to prevent propagation of a crack into the active region of a 3D integrated circuit, such as a crack initiated by a flaw at the periphery of a thinned substrate layer or a bonding layer, and methods of forming the same is disclosed.
Abstract:
Disclosed is a semiconductor device wherein an insulation layer has a copper plug in contact with the last wiring layer of the device. There may also be a barrier layer separating the copper plug from the insulation layer. In a further embodiment, there may also be an aluminum layer between the insulation layer and copper plug. Also disclosed is a process for making the semiconductor device.
Abstract:
The present invention provides bond pads structures between semiconductor integrated circuits and the chip package with enhanced resistance to fracture and improved reliability. Mismatch in the coefficient of temperature expansion (CTE) among the materials used in bond structures induces stress and shear on them that may result in fractures within the back end dielectric stacks and cause reliability problems of the packaging. By placing multiple metal pads which are connected to the bond pad through multiple metal via, the adhesion between the bond pads and the back end dielectric stacks is enhanced.
Abstract:
Structures and a method for forming the same. The structure includes a semiconductor substrate, a transistor on the semiconductor substrate, and N interconnect layers on top of the semiconductor substrate, N being a positive integer. The transistor is electrically coupled to the N interconnect layers. The structure further includes a first dielectric layer on top of the N interconnect layers and P crack stop regions on top of the first dielectric layer, P being a positive integer. The structure further includes a second dielectric layer on top of the first dielectric layer. Each crack stop region of the P crack stop regions is completely surrounded by the first dielectric layer and the second dielectric layer. The structure further includes an underfill layer on top of the second dielectric layer. The second dielectric layer is sandwiched between the first dielectric layer and the underfill layer.
Abstract:
Test structures for electrically detecting BEOL failures are provided. In an embodiment, the structure comprises: an input/output connection disposed above a primary conductive pad which is embedded in an insulator; a dielectric layer disposed upon the insulator; a primary via extending through the dielectric layer down to the primary conductive pad for providing electrical connection between the input/output connection and the primary conductive pad; and a secondary via filled with a conductive material in electrical connection with the input/output connection, the secondary via extending through the dielectric layer down to a secondary interconnect in electrical connection with a secondary conductive pad that is insulated from the primary conductive pad.
Abstract:
Disclosed are embodiments of a far back end of the line solder connector and a method of forming the connector that eliminates the use aluminum, protects the integrity of the ball limiting metallurgy (BLM) layers and promotes adhesion of the BLM layers by incorporating a thin conformal conductive liner into the solder connector structure. This conductive liner coats the top of the via filling in any divots in order to create a uniform surface for BLM deposition and to, thereby, protect the integrity of the BLM layers. The liner further coats the dielectric sidewalls of the well in which the BLM layers are formed in order to enhance adhesion of the BLM layers to the well.
Abstract:
The invention is directed to an improved semiconductor chip that reduces crack initiation and propagation into the active area of a semiconductor chip. A semiconductor wafer includes dicing channels that separate semiconductor chips and holes through a portion of a semiconductor chip, which are located at the intersection of the dicing channels. Once diced from the semiconductor wafer, semiconductor chips are created without ninety degree angle corners.
Abstract:
Methods of forming an aluminum-free wire bond pad and the pad so formed are disclosed. In one embodiment, the method includes forming an opening through a dielectric layer to a last metal of a chip; forming a tantalum nitride (TaN) layer over the chip and over the opening; removing the tantalum nitride (TaN) layer outside of the opening; forming a passivation mask layer over the chip including a passivation mask opening over the last metal; forming a titanium tungsten (TiW) layer and a copper (Cu) layer over the chip; forming a mask layer over the chip including a mask opening to the copper (Cu) layer over the last metal; forming a nickel (Ni) layer and a copper (Cu) layer and then a gold (Au) layer in the mask opening; and removing the mask.
Abstract:
Disclosed are embodiments of a far back end of the line solder connector and a method of forming the connector that eliminates the use aluminum, protects the integrity of the ball limiting metallurgy (BLM) layers and promotes adhesion of the BLM layers by incorporating a thin conformal conductive liner into the solder connector structure. This conductive liner coats the top of the via filling in any divots in order to create a uniform surface for BLM deposition and to, thereby, protect the integrity of the BLM layers. The liner further coats the dielectric sidewalls of the well in which the BLM layers are formed in order to enhance adhesion of the BLM layers to the well.
Abstract:
A structure to prevent propagation of a crack into the active region of a 3D integrated circuit, such as a crack initiated by a flaw at the periphery of a thinned substrate layer or a bonding layer, and methods of forming the same is disclosed.