Model GDM300 grinder is a fully automatic continuous downfeed grinding machine with dual polishing stations for increased throughput. Wafers are handled through the machine by a 6-axis robot, and load/unload arms designed for 25 um capability. An optional edge trimming system is recommended for eliminating edge chipping for thin wafers. Chuck speed, grinding wheel, and grind spindle downfeed rate speeds can be used to manipulate grinder throughput, surface finish, and wheel life. A two-point in-process gauge measuring system controls wafer thickness under grind spindles 1 and 2 with an optional laser detection for a more precision thickness accuracy (recommended for < 50 um). Programmable oscillating polish heads can be programmed to maintain wafer profile (ttv) in conjunction with with the optional motorized spindle angle adjustment. After completion at grind and polish, wafer is automatically transferred by robot to the mounter unit for UV exposure, detape, and mount. Pre-cut DAF feature is optional while single DAF is included. Coin-stack feature may be integrated. The local polishing unit removes subsurface damage for increased wafer die strength and the ability to handle final thickness of 25 microns.
OKAMOTO GDM300晶圓拋光/晶圓背拋特點:
The process from back grinding to wafer mounting continuously by fully automatic system,
Which enable to grind till 25um thickness.
With 2 head polishing stage, throughput is almost double compared with 1 polish head system.
Built in edge trimming system is available as an option for thin wafer process.
Dual index system, which polishing stage and grinding stage is completely separated,
satisfy the cleanness required for TSV and MEMS process.
Less thanRa1? ultra luminance, ultra mirror surface is possible.
OKAMOTO GDM300晶圓拋光/晶圓背拋規格參數:
Maximum wafer-
machining diameter of wafer
12"
Grinding Spindle: Bearing type
Motor
Rapid feed speed
Grind feed speed
Air bearing, maximum 3000 rpm
5.5 kw, 4P, high frequency motor
240 mm/min
1 to 999 µm/min
Grinding wheel size
?300 mm
Index Table: Number of work spindles
Work spindle Bearing type
Speed of Work Spindles
3
Air Bearing
1 to 300 rpm
Automatic Sizing Device:
Wafer thickness measuring system
Wafer minimum setting size resolution
Wafer size display range
2 point contact in-process gauge,Laser Detection (Opt.)
0.1 µm
0to 1.6 mm; extended range software available
Table Cleaning Device (Grinder side)
DI Water + Ceramic block
Wafer Cleaning Unit (Grinder side)
DI Water + Brush
Edge Trimming Device (Optional):
Max Spindle Speed
Accuracy
Recommended for < 50 um.
1800 rpm
+/- 5 µm
Number of Cassettes
2 cassette stations
Polish Station: Work Spindle
Polish head
Oscillation speed
Head Load
Pad size
2High Precision Ball Bearing Work Spindles on Index Table