Abstract:
Methods of conducting wafer level burn-in (WLBI) of semiconductor devices are presented wherein systems are provided having at least two electrodes (210, 215). Electrical bias (920) and/or thermal power (925) is applied on each side of a wafer (100) having back and front electrical contacts for semiconductor devices borne by the wafer. A pliable conductive layer (910) is described for supplying pins on the device side of a wafer with electrical contact and/or also for providing protection to the wafer from mechanical pressure being applied to its surfaces. Use of a cooling system (950) is also described for enabling the application of a uniform temperature to a wafer undergoing burn-in. Wafer level burn-in is performed by applying electrical and physical contact (915) using an upper contact plate to individual contacts for the semiconductor devices ; applying electrical and physical contact using a lower contact plate (910) to a substrate surface of said semiconductor wafer ; providing electrical power (920) to said semiconductor devices through said upper and lower second contact plates from a power source coupled to said upper and lower contacts plates ; monitoring and controlling electrical power (935) to said semiconductor devices for a period in accordance with a specified burn-in criteria ; removing electrical power at completion of said period (955) ; and removing electrical and physical contact to said semiconductor wafer (965).
Abstract:
Disclosed are methods for providing wafer parasitic current control to a semiconductor wafer (1500) having a substrate (1520), at least one active layer (1565) and a surface layer (1510), and electrical contacts (1515) formed on said surface layer (1510). Current control can be achieved with the formation of trenches (1525) around electrical contacts, where electrical contacts and associated layers define an electronic device. Insulating implants (1530) can be placed into trenches (1525) and/or sacrificial layers (1540) can be formed between electronic contacts (1515). Trenches control current by promoting current flow within active (e.g., conductive) regions (1560) and impeding current flow through inactive (e.g., nonconductive) regions (1550). Methods of and systems for wafer level burn-in (WLBI) of semiconductor devices are also disclosed. Current control at the wafer level is important when using WLBI methods and systems.
Abstract:
Systems for wafer level burn-in (WLBI) of semiconductor devices (210, 215) a re presented. Systems having at least two electrodes for the application of electrical bias and/or thermal power on each side of a wafer (100) having ba ck (105) and front (110) electrical contacts for semiconductor devices borne by the wafer (100) is described. Methods of wafer level burnin using the system are also described. Furthermore, a pliable conductive layer (220) is describ ed for supplying pins or contacts (110) on device side of a wafer with electric al contact. The pliable conductive layer (220) can allow for an effective serie s R in each of the devices borne by the wafer (100), thus helping keep voltage bias level consistent. The pliable conductive layer can also prevent damage to a wafer when pressure is applied to it by chamber contacts (210, 215) and pressure onto surfaces of the wafer (100) during burn-in operations. A cooli ng system (660) is also described for enabling the application of a uniform temperature to the wafer (100) undergoing burn-in.
Abstract:
Disclosed are methods for providing wafer parasitic current control to a semiconductor wafer (1500) having a substrate (1520), at least one active layer (1565) and a surface layer (1510), and electrical contacts (1515) formed on said surface layer (1510). Current control can be achieved with the formation of trenches (1525) around electrical contacts, where electrical contacts and associated layers define an electronic device. Insulating implants (1530) can be placed into trenches (1525) and/or sacrificial layers (1540) can be formed between electronic contacts (1515). Trenches control current by promoting current flow within active (e.g., conductive) regions (1560) and impeding current flow through inactive (e.g., nonconductive) regions (1550). Methods of and systems for wafer level burn-in (WLBI) of semiconductor devices are also disclosed. Current control at the wafer level is important when using WLBI methods and systems.
Abstract:
Methods of conducting wafer level burn-in (WLBI) of semiconductor devices ar e presented wherein systems are provided having at least two electrodes (210, 215). Electrical bias (920) and/or thermal power (925) is applied on each si de of a wafer (100) having back and front electrical contacts for semiconductor devices borne by the wafer. A pliable conductive layer (910) is described fo r supplying pins on the device side of a wafer with electrical contact and/or also for providing protection to the wafer from mechanical pressure being applied to its surfaces. Use of a cooling system (950) is also described for enabling the application of a uniform temperature to a wafer undergoing burn - in. Wafer level burn-in is performed by applying electrical and physical contact (915) using an upper contact plate to individual contacts for the semiconductor devices ; applying electrical and physical contact using a low er contact plate (910) to a substrate surface of said semiconductor wafer ; providing electrical power (920) to said semiconductor devices through said upper and lower second contact plates from a power source coupled to said upper and lower contacts plates ; monitoring and controlling electrical powe r (935) to said semiconductor devices for a period in accordance with a specified burn-in criteria ; removing electrical power at completion of said period (955) ; and removing electrical and physical contact to said semiconductor wafer (965).