摘要:
A method of detecting surface pressure distribution of a wafer being processed by a CMP (Chemical Mechanical Polishing) process; more specifically, the invention relates to a method of detecting pressure distribution of a wafer surface by employing pressure sensitive films located on various pressure components such as a wafer carrier, a polishing pad, and mechanical arm members of a CMP machine for detecting pressure-related data during different stages of a CMP process. Further, sensed pressure-related data are collected for feedback loop controls of digital image mapping, numeration, simulation, and forecasting, from which more mechanical components of high precision and better circuit layouts on the wafer can then be developed.
摘要:
An interconnect structure for use in semiconductor devices, comprising: (a) a thin and elongated aluminum wire connected to a first metal structure; and (b) a plurality of regularly spaced dummy tungsten plugs which are connected to the aluminum wire at one end and are buried in an underlying dielectric layer so that it is insulated at the other end. The dummy tungsten plugs absorb the mobile aluminum atoms generated through stress-induced migration when the interconnect structure is subject to a rapid temperature change, thus preventing the via bulging problem which could seriously damage the second metal structure above the first metal structure.
摘要:
A wafer planarization process which utilizes combined high density plasma chemical vapor deposition (HDP-CVD) process and chemical mechanical polishing (CMP) process is disclosed. This process includes the steps of (a) forming a first HDP-CVD layer on the surface of a semiconductor wafer using a first HDP-CVD composition having a higher etching/depositing component ratio and thus a lower CMP removal rate; (b) forming a second HDP-CVD layer on the first HDP-CVD layer using the same HDP-CVD process but with a second HDP-CVD composition having a highest etching/depositing component ratio and thus the lowest CMP removal rate; (c) forming a third HDP-CVD layer on the second HDP-CVD layer using the same HDP-CVD process but with a third HDP-CVD composition having a low etching/depositing component ratio and thus a high CMP removal rate; and (d) using a chemical mechanical process to remove at least a part of the third HDP-CVD layer using the second HDP-CVD layer as a stopper. All the three HDP-CVD compositions contain the same etching and silicon-containing deposition components so as to improve the CMP efficiency without incurring substantially increased fabrication cost.
摘要:
A wafer planarization process which utilizes combined high density plasma chemical vapor deposition (HDP-CVD) process and chemical mechanical polishing (CMP) process is disclosed. This process includes the steps of (a) forming a first HDP-CVD layer on the surface of a semiconductor wafer using a first HDP-CVD composition having a higher etching/depositing component ratio and thus a lower CMP removal rate; (b) forming a second HDP-CVD layer on the first HDP-CVD layer using the same HDP-CVD process but with a second HDP-CVD composition having a lower etching/depositing component ratio and thus a higher CMP removal rate; and (c) using a chemical mechanical process to remove at least a part of the second HDP-CVD layer using the first HDP-CVD layer as a stopper. A protective layer with the same etching/deposition components but a different ratio than the sacrificial layer can be deposited on the sacrificial layer to minimize the dishing effect during the initial stage of the chemical mechanical polishing process.
摘要:
A manufacturing method and a structure of a multi-layered dielectric layer for forming openings in the dielectric layers for improving integration of integrated circuits, capability of step coverage, and problems caused by a structure of overhang, in which oblique sidewalls of the openings in multi-layered dielectric layer can improve the step coverage in the following manufacturing process.
摘要:
An improved metal bonding pad is disclosed which can prevent the formation of cracks during the high temperature PECVD deposition, and the subsequent annealing, of a passivation layer which is formed to encroach the metal bonding pad and provide an encapsulation force on the metal bonding pad. The metal bonding pad comprises a plurality of stress bumpers on the periphery thereof. The stress bumpers can be hollow elongated round-cornered rectangles, pin-shaped circles, Y-shaped polygons, or ellipses. The stress bumpers, which create a discontinuous structure in the metal pad, can effectively stop stress propagation as well as relieve and re-direct stress propagation, so as to maintain the integrity of the passivation encroachment and prevent the peeling off problems often observed with the metal bonding pad.
摘要:
A method for chemically-and-mechanically polishing a semiconductor wafer surface is disclosed. It includes the steps of: (a) providing a mechanical polishing pad; (b) placing a pressure-sensitive film on top of a wafer surface to be polished by the mechanical polishing pad, the pressure-sensitive film contains materials that will show pressure-dependent colors when subject to an external pressure; (c) commencing a chemically-and-mechanically polishing process so that the mechanical polishing pad exerts a pressure on the pressure-sensitive film; (d) scanning the pressure-dependent color pattern on the pressure-sensitive film; (e) converting the pressure-dependent color pattern into a pressure distribution; and (f) adjusting the mechanical polishing pad, or a leveling of the wafer mounting, or both, according to the pressure distribution obtained in step (e).
摘要:
A scribe line structure of a semiconductor wafer is provided in the invention. The semiconductor wafer has a plurality of substantially parallel horizontal scribe lines and a plurality of substantially parallel vertical scribe lines to separate a plurality of chips from each other. According to the invention, each parallel horizontal scribe line and each parallel vertical scribe line are divided along two elongated sides thereof into a plurality of portions with the same rectangular area. Each of the plurality of portions of each scribe line is composed of the scribe line structure. The scribe line structure comprises a multi-layer structure with four sides formed over whole area of each portion of each scribe line and at least two rows of cavities formed along the four sides of the multi-layer structure. The cavities of the scribe line structure are capable of relieving internal stress of the scribe lines and arresting possible cracks induced during scribe line manufacture. Thereby, peeling, delamination and dielectric fracture of the scribe lines induced during the wafer manufacture can be prevented.
摘要:
A manufacturing method and a structure of a multi-layered dielectric layer for forming openings in the direction layers for improving integration of integrated circuits, capability of step coverage, and problems caused by a structure of overhang, in which oblique sidewalls of the openings in multi-layered dielectric layer can improve the step coverage in the following manufacturing process.
摘要:
A process for forming shallow trench isolation (STI) structures. It includes the steps of: (a) depositing a composite silicon nitride on to the silicon substrate; (b) forming a shallow trench on the silicon substrate by etching, using the composite silicon nitride as the hard mask; (c) depositing a filler oxide layer inside the shallow trench as well as on top of the composite silicon nitride, using a chemical vapor deposition (CVD) method; and (d) using a chemical-mechanical polishing (CMP) process to planarize the filler oxide layer using the composite nitride as a CMP stop. The composite silicon nitride comprises a plurality of silicon nitride layers whose CMP removal rate increases with the distance from the silicon substrate. Additionally, a composite silicon oxide layer can be formed on top of the filler oxide layer which comprises a plurality of silicon oxide layers whose CMP removal rate increases with the distance from the silicon substrate.