摘要:
In the case of the cost-effective method according to the invention for fabricating a power transistor arrangement, a trench power transistor arrangement (1) is fabricated with four patterning planes each containing a lithography step. The power transistor arrangement according to the invention has a cell array (3) with cell array trenches (5) each containing a field electrode structure (11) and a gate electrode structure (10). The field electrode structure (11) is electrically conductively connected to the source metallization (15) by a connection trench (6) in the cell array (3).
摘要:
When fabricating trench power transistor arrangements (1) with active cell array trenches (5) and passive connecting trenches (6), the cell array trenches (5) are provided in greater width than the connecting trenches (6). An auxiliary layer (24) is deposited conformally onto a lower field electrode structure (11) in the cell array trenches (5) and the connecting trenches (6) and is etched back as far as the top edge in the connecting trenches (6), which removes it from the cell array trenches (5). The auxiliary layer (24) allows the gate oxide (20) to be patterned without a complex mask process. An edge trench (7), with an electrode, on the potential of the field electrode structure (11) shields the cell array (3) from a drain potential.
摘要:
A method for fabricating a transistor configuration including at least one trench transistor cell has a gate electrode and a field electrode disposed in a trench below the gate electrode. The trenches are formed in a semiconductor substrate. A drift zone, a channel zone, and a source zone are in each case provided in the semiconductor substrate. According to the invention, the source zone and/or the channel zone are formed at the earliest after the introduction of the trenches into the semiconductor substrate by implantation and diffusion.
摘要:
A semiconductor component has a cell array formed in a semiconductor body with a number of identical transistor cells and at least one edge cell formed at an edge of the cell array. Each of the transistor cells has a control electrode, which is formed in a trench, and the edge cell has a field plate, which is formed in a trench, with a distance between the trench of the edge cell and the trench of the immediately adjacent transistor cell being less than the distance between a trench of a transistor cell and the trench of an immediately adjacent transistor cell in the cell array.
摘要:
A method for fabricating a field-effect-controllable semiconductor component includes providing a configuration having a semiconductor body with a front side, a rear side, a first terminal zone of a first conduction type, a channel zone of a second conduction type formed above the first terminal zone, and at least one control electrode adjacent the channel zone. The control electrode is insulated from the semiconductor body. A second terminal zone of the first conduction type is fabricated in the channel zone near the front side of the semiconductor body by: doping the channel zone near the front side with a first dopant concentration to fabricate a first zone of the first conduction type, and doping a section of the first zone with a second dopant concentration higher than the first dopant concentration to form a second zone of the first conduction type.
摘要:
Transistor configurations have trench transistor cells disposed along trenches in a semiconductor substrate with two or more electrode structures disposed in the trenches, and also metallizations are disposed above a substrate surface of the semiconductor substrate. The trenches extend into an inactive edge region of the transistor configuration and an electrically conductive connection between the electrode structures and corresponding metallizations are provided in the edge region.