摘要:
A semiconductor package includes a leadframe which is cup-shaped and holds a semiconductor die. The leadframe is in electrical contact with a terminal on one side of the die, and the leads of the leadframe are bent in such a way that portions of the leads are coplanar with the other side of the die, which also contains one or more terminals. A plastic capsule is formed around the leadframe and die.
摘要:
A semiconductor package includes a leadframe which is cup-shaped and holds a semiconductor die. The leadframe is in electrical contact with a terminal on one side of the die, and the leads of the leadframe are bent in such a way that portions of the leads are coplanar with the other side of the die, which also contains one or more terminals. A plastic capsule is formed around the leadframe and die.
摘要:
A semiconductor package includes a leadframe which is cup-shaped and holds a semiconductor die. The leadframe is in electrical contact with a terminal on one side of the die, and the leads of the leadframe are bent in such a way that portions of the leads are coplanar with the other side of the die, which also contains one or more terminals. A plastic capsule is formed around the leadframe and die.
摘要:
A semiconductor package includes a leadframe which is cup-shaped and holds a semiconductor die. The leadframe is in electrical contact with a terminal on one side of the die, and the leads of the leadframe are bent in such a way that portions of the leads are coplanar with the other side of the die, which also contains one or more terminals. A plastic capsule is formed around the leadframe and die.
摘要:
A semiconductor package includes a leadframe which is cup-shaped and holds a semiconductor die. The leadframe is in electrical contact with a terminal on one side of the die, and the leads of the leadframe are bent in such a way that portions of the leads are coplanar with the other side of the die, which also contains one or more terminals. A plastic capsule is formed around the leadframe and die.
摘要:
An improved semiconductor device is disclosed. In one embodiment, the semiconductor device includes a semiconductor chip with contact areas on the top or bottom surface. A first lead assembly, formed from a semi-rigid sheet of conductive material, has a lead assembly contact attached to one of the contact areas of the semiconductor chip. The first lead assembly also has at least one lead connected to and extending from the lead assembly contact. A second lead assembly, also formed from a semi-rigid sheet of conductive material, has a lead assembly contact attached to another one of the contact areas of the semiconductor chip. The second lead assembly also has at least one lead connected to and extending from the lead assembly contact. An encapsulant encloses the semiconductor chip, the lead assembly contact of the first lead assembly and the lead assembly contact of the second lead assembly. The semiconductor device has low electrical and thermal resistance contributions from the package due to the direct connection of the lead assemblies to the chip. The semiconductor device may be formed as either a leaded package or a leadless chip carrier package.
摘要:
A semiconductor package by which contacts are made to both sides of the dice is manufactured on a wafer scale. The back side of the wafer is attached to a metal plate. The scribe lines separating the dice are saw cut to expose the metal plate but the cuts do not extend through the metal plate. A metal layer, which may include a number of sublayers, is formed on the front side of the dice, the metal covering the exposed portions of the metal plate and extending the side edges of the dice. Separate sections of the metal layer may also cover connection pads on the front side of the dice. A second set of saw cuts are made coincident with the first set of saw cuts, using a blade that is narrower than the blade used to make the first set of saw cuts. As a result, the metal layer remains on the side edges of the dice connecting the back and front sides of the dice (via the metal plate). Since no wire bonds are required, the resulting package is rugged and provides a low-resistance electrical connection between the back and front sides of the dice.
摘要:
In a semiconductor package for a chip having terminals on both sides, for example, a power MOSFET in which the gate and source terminals are on the front side and the drain terminal is on the back side, electrical contact is made with the back side terminal by extending vias, which can take the form of trenches, holes or other cavities, either entirely or patrially through the chip. The vias are filled with a metal or other electrically conductive material. The process is performed on the chips in a wafer simultaneously. The resulting package is compact and economical to manufacture and can readily be mounted, flip-chip style, on a printed circuit board.
摘要:
A semiconductor package by which contacts are made to both sides of the dice is manufactured on a wafer scale. The back side of the wafer is attached to a metal plate. The scribe lines separating the dice are saw cut to expose the metal plate but the cuts do not extend through the metal plate. A metal layer, which may include a number of sublayers, is formed on the front side of the dice, the metal covering the exposed portions of the metal plate and extending the side edges of the dice. Separate sections of the metal layer may also cover connection pads on the front side of the dice. A second set of saw cuts are made coincident with the first set of saw cuts, using a blade that is narrower than the blade used to make the first set of saw cuts. As a result, the metal layer remains on the side edges of the dice connecting the back and front sides of the dice (via the metal plate). Since no wire bonds are required, the resulting package is rugged and provides a low-resistance electrical connection between the back and front sides of the dice.
摘要:
A semiconductor package with contacts on both sides of the dice on a wafer scale. The back side of the wafer is attached to a metal plate. The scribe lines separating the dice expose the metal plate without extending through the metal plate. A metal layer may be formed on the front side of the dice, covering the exposed portions of the metal plate and extending to side edges of the dice. The metal layer may cover connection pads on the front side of the dice. A second set of scribe lines are made coincident with the first set. Therefore, the metal layer remains on the side edges of the dice coupling the front and the back. As a result, the package is rugged and provides a low-resistance electrical connection between the back and front sides of the dice.