Abstract: A method for preparing an ohmic contact electrode of a GaN-based device. Said method comprises the following steps: growing a first dielectric layer (203) on an upper surface of a device (S1); implanting silicon ions and/or indium ions in a region of the first dielectric layer (203) corresponding to an ohmic contact electrode region, and in the ohmic contact electrode region of the device (S2); growing a second dielectric layer (206) on an upper surface of the first dielectric layer (203) (S3); activating the silicon ions and/or the indium ions by means of a high temperature annealing process, so as to form an N-type heavy doping (S4); respectively removing portions, corresponding to the ohmic contact electrode region, of the first dielectric layer (203) and the second dielectric layer (206) (S5); growing a metal layer (208) on the upper surface of the ohmic contact electrode region of the device, so as to form an ohmic contact electrode (S6).

Abstract: A method for preparing an ohmic contact electrode of a GaN-based device. Said method comprises the following steps: growing a first dielectric layer (203) on an upper surface of a device (51); implanting silicon ions and/or indium ions in a region of the first dielectric layer (203) corresponding to an ohmic contact electrode region, and in the ohmic contact electrode region of the device (S2); growing a second dielectric layer (206) on an upper surface of the first dielectric layer (203) (S3); activating the silicon ions and/or the indium ions by means of a high temperature annealing process, so as to form an N-type heavy doping (S4); respectively removing portions, corresponding to the ohmic contact electrode region, of the first dielectric layer (203) and the second dielectric layer (206) (S5); growing a metal layer (208) on the upper surface of the ohmic contact electrode region of the device, so as to form an ohmic contact electrode (S6).

Abstract: A method and a system are disclosed for processing online joint guarantee. After a server receives an application from a user, the server provides various types of joint guarantee grouping to the user for selection. The server creates a joint guarantee group having a unique ID according to the selection of the user, organizes the information of the joint guarantee group into a data packet and sends the data packet to a bank system to be approved. The method potentially improves the success rate of joint guarantee grouping and removes the geographical limitations. Through the Internet, the method makes it possible to join companies of different geographical locations for online joint guarantee. The method also establishes a complete online alert mechanism, and realizes computerized loan risk control to improve the business credit system.