摘要:
A method includes the steps of: (a) fixing a front surface of a wafer (semiconductor wafer) having the front surface, a plurality of chip regions formed on the front surface, a dicing region formed between the chip regions, and a rear surface opposite to the front surface to the supporting member; (b) in a state of having the wafer fixed to the supporting member, grinding the rear surface of the wafer to expose the rear surface; (c) in a state of having the wafer fixed to the supporting member, dividing the wafer into the chip regions; (d) etching side surfaces of the chip regions to remove crushed layers formed in the step (c) on the side surfaces and obtain a plurality of semiconductor chips. After the steps (e) and (d), the plurality of divided chip regions are peeled off from the supporting member to obtain a plurality of semiconductor chips.
摘要:
In a state where an adhesive tape is attached onto a main surface of a semiconductor wafer, a trench is formed in a rear surface of the semiconductor wafer. For forming the trench in the rear surface of the semiconductor wafer, after coating a resist film on the rear surface of the semiconductor wafer, the resist film is patterned by using the photolithography technology. The patterning of the resist film is performed so as not to leave the resist film in the region where the trench is to be formed. Then, the trench is formed in a predetermined region of the semiconductor wafer by the dry etching technology using the patterned resist film as a mask. Specifically, the trench is formed in the region near the dicing line.
摘要:
To improve the reliability and yield of a thin-type semiconductor device as used for a stack-type flash memory, the semiconductor device is manufactured by upheaving each of semiconductor chips (semiconductor devices) obtained by dicing a semiconductor wafer on an adhesive sheet from a backside via the adhesive sheet using an upthrow jig to which ultrasonic vibration is applied so as not to break through the adhesive sheet, and by picking up each semiconductor chip.
摘要:
In a semiconductor device in which a plurality of semiconductor chips are stacked on a mounting substrate, an adhesive material formed of resin mainly having a thermosetting property is applied to a semiconductor chip mounting region on the mounting substrate. After mounting semiconductor chips on the adhesive material, the adhesive material is cured by heat treatment. When these parts are naturally cooled to a normal temperature, the mounting substrate warps in a convex shape due to the difference in an α value between the mounting substrate and the semiconductor chip. However, pads are connected by wire bonding and, an adhesive material formed of resin having a thermoplastic property is laminated to the semiconductor chip. Then, a spacer chip is bonded to the adhesive material by thermal compression bonding. Accordingly, due to heat generated at the time of thermal compression bonding, the mounting substrate and the semiconductor chip become substantially flat.
摘要:
A contact collect is provided to prevent damage to the top surface of a semiconductor chip at the time of die bonding the semiconductor chip. A protection tape is pasted to the top surface of the semiconductor chip before die bonding of the semiconductor chip is executed by pressing the back surface (underside) of the semiconductor chip sucked and securely held by the contact collect against respective chip-mounting regions of a multi-wiring board. The contact collect is, for example, substantially cylidrical in outside shape, and a bottom part (suction head) thereof is made of soft synthetic rubber, etc. The protection tape pasted to the top surface of the semiconductor chip prevents the top surface of the semiconductor chip from directly contacting with the contact collect even at the time of vacuum suction by pressing the suction head of the contact collect against the top surface of the semiconductor chip.
摘要:
To divide a semiconductor wafer by stealth dicing, a test pad in a cutting region and an alignment target are collectively arranged along one side in a width direction of the cutting region, and a laser beam for forming a modified region is irradiated to a position away in plane from the test pad and the alignment target Am. In this manner, defects in cutting shape in a cutting process of a semiconductor wafer using stealth dicing can be reduced or prevented.
摘要:
The semiconductor device having the structure which laminated the chip in many stages is made thin. A reforming area is formed by irradiating a laser beam, where a condensing point is put together with the inside of the semiconductor substrate of a semiconductor wafer. Then, after applying the binding material of liquid state to the back surface of a semiconductor wafer by a spin coating method, this is dried and a solid-like adhesive layer is formed. Then, a semiconductor wafer is divided into each semiconductor chip by making the above-mentioned reforming area into a division origin. By pasting up this semiconductor chip on the main surface of an other semiconductor chip by the adhesive layer of the back surface, the semiconductor device having the structure for which the semiconductor chip was laminated by many stages is manufactured.
摘要:
A technique capable of stably releasing chips from a dicing tape, includes grinding a back surface of a semiconductor wafer, while adhering a pressure sensitive adhesive tape to a circuit forming surface of the semiconductor wafer formed with an integrated circuit, to achieve a predetermined thickness and forcibly oxidizing the back surface of the semiconductor wafer. Then, the pressure sensitive adhesive tape adhered to the circuit forming surface of the semiconductor wafer is released, and a dicing tape is adhered to the back surface of the semiconductor wafer. Further, the semiconductor wafer is divided by dicing it into individual chips, and then the back surface of the chip is pressed by way of the dicing tape, thereby releasing the chips from the dicing tape.
摘要:
The reliability of the semiconductor device which has the structure which stores a plurality of semiconductor chips with which plane sizes differ in the same sealing body in the state where they are accumulated via the insulating film which has adhesive property is improved.In the semiconductor device which has the structure which stores a plurality of semiconductor chips with which plane sizes differ in the same sealing body in the state where they are accumulated via DAF, thickness of DAF of the back surface of the uppermost semiconductor chip with which the control circuit was formed was made thicker than each of DAF of the back surface of the lower layer semiconductor chip with which the memory circuit was formed. Hereby, the defect that the bonding wire which connects the uppermost semiconductor chip and a wiring substrate contacts the main surface corner part of a lower layer semiconductor chip can be reduced.
摘要:
The lowering of the manufacturing yield of semiconductor products resulting from the contamination impurities from the back surface of a semiconductor wafer is suppressed. When making thin semiconductor wafer 1, the first crushing layer formed by grinding the back surface of semiconductor wafer 1 with the first and second abrasive which has fixed abrasive is removed. Thereby, the die strength after dividing or mostly dividing semiconductor wafer 1 and making a chip is secured. Then, from the back surface side of semiconductor wafer 1, laser beam 16 is irradiated in the predetermined region of the predetermined depth from the back surface of semiconductor wafer 1, and for example, second crushing layer 15 with the gettering function of less than 1.0 μm, less than 0.5 μm, or less than 0.1 μm in thickness is formed newly.