Abstract:
The invention relates to a semiconductor wafer oxidation furnace comprising a torch (12) connected to a furnace tube (11) by a fluidic connection (14) and a means for adjusting a gas flow downstream of the torch (12) in the direction of the furnace tube (11).
Abstract:
In described examples, an integrated circuit (100) includes a field-plated FET (110) and is formed by forming a first opening in a layer of oxide mask, exposing an area for a drift region (116). Dopants are implanted into the substrate (102) under the first opening. Subsequently, dielectric sidewalls are formed along a lateral boundary of the first opening. A field relief oxide (122) is formed by thermal oxidation in the area of the first opening exposed by the dielectric sidewalls. The implanted dopants are diffused into the substrate (102) to form the drift region (116), extending laterally past the layer of field relief oxide (122). The dielectric sidewalls and layer of oxide mask are removed after the layer of field relief oxide (122) is formed. A gate (130) is formed over a body (120) of the field-plated FET (110) and over the adjacent drift region (116). A field plate (132) is formed immediately over the field relief oxide (122) adjacent to the gate (130).
Abstract:
A single crystal semiconductor handle substrate for use in the manufacture of semiconductor-on-insulator (e.g., silicon-on-insulator (SOI)) structure is etched to form a porous layer in the front surface region of the wafer. The etched region is oxidized and then filled with a semiconductor material, which may be polycrystalline or amorphous. The surface is polished to render it bondable to a semiconductor donor substrate. Layer transfer is performed over the polished surface thus creating semiconductor-on-insulator (e.g., silicon-on-insulator (SOI)) structure having 4 layers: the handle substrate, the composite layer comprising filled pores, a dielectric layer (e.g., buried oxide), and a device layer. The structure can be used as initial substrate in fabricating radiofrequency chips. The resulting chips have suppressed parasitic effects, particularly, no induced conductive channel below the buried oxide.
Abstract:
A method of forming a patterned hard mask on a surface of a substrate uses an accelerated neutral beam with carbon atoms. The objects set forth above as well as further and other objects and advantages of the present invention are achieved by the various embodiment's of the invention described herein below.
Abstract:
A method of fabricating a memory device is described. Generally, the method includes: forming on a surface of a substrate a dielectric stack including a tunneling dielectric and a charge-trapping layer overlying the tunneling dielectric; depositing a first cap layer comprising an oxide over the dielectric stack; forming a second cap layer comprising a nitride over the first cap layer; patterning the first and second cap layers and the dielectric stack to form a gate stack of a memory device; removing the second cap layer; and performing an oxidation process to form a blocking oxide over the charge-trapping layer, wherein the oxidation process consumes the first cap layer. Other embodiments are also described.
Abstract:
A semiconductor fin is on a substrate, and extends in a longitudinal direction parallel to the substrate. The fin projects, in a vertical direction, to a fin top at a fin height above the substrate. An embedded fin stressor element is embedded in the fin. The fin stressor element is configured to urge a vertical compression force within the fin, parallel to the vertical direction. Optionally, the semiconductor material includes silicon, and embedded fin stressor element includes silicon dioxide.
Abstract:
Devices and methods for selectively oxidizing silicon are described herein. An apparatus for selective oxidation of exposed silicon surfaces includes a thermal processing chamber with a plurality of walls, first inlet connection and a second inlet connection, wherein the walls define a processing region within the processing chamber, a substrate support within the processing chamber, a hydrogen source connected with the first inlet connection, a heat source connected with the hydrogen source, and a remote plasma source connected with the second inlet connection and an oxygen source. A method for selective oxidation of non-metal surfaces, can include positioning a substrate in a processing chamber at a temperature less than 800°C, flowing hydrogen into the processing chamber, generating a remote plasma comprising oxygen, mixing the remote plasma with the hydrogen gas in the processing chamber to create an activated processing gas, and exposing the substrate to the activated gas.
Abstract:
Procédé de traitement d'au moins une première couche de matériau comportant des liaisons siloxanes dont au moins une surface est destinée à être solidarisée à une surface d'une deuxième couche de matériau par un collage direct, comportant au moins une étape de diffusion forcée à une température au moins égale à environ 30°C, au moins dans la première couche de matériau, d'espèces chimiques comprenant au moins une paire d'électrons libres et au moins un proton labile, transformant au moins une partie des liaisons siloxanes en liaisons silanoles dans au moins une partie de la première couche de matériau s'étendant depuis ladite surface jusqu'à une profondeur supérieure ou égale à environ 10 nm.