FFE300 Gencoa Ltd - 2015 · • Gencoa ffe magnetrons are available from 75mm to 600mm target...
Transcript of FFE300 Gencoa Ltd - 2015 · • Gencoa ffe magnetrons are available from 75mm to 600mm target...
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Gencoa © 2014 - confidential
FFE300 Gencoa Ltd - 2015
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High performance components from Gencoa for Semiconductor Applications
• New and retro-fit magnetrons and magnetics • Reactive gas control & End Point Detection
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Gencoa offer the following categories of products for static wafer coating
200mm
300mm
Reactive Gas
Control
150mm
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150mm static wafer coating
250ffe
SW250HU
SW300HU
300ffe 150mm
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200mm static wafer coating
SW300HU 300ffe
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300mm static wafer coating
400-450ffe
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Gencoa 300FFE
Key Features
• No magnet pack in water – easily accessible • Slow to Fast rotation of the magnets provides:
• Uniformity tuning ability via speed control • Better arcs suppression – less time for charge-build-
up at higher rotation speeds • Less layer defects from arc events
• Better than ±3% uniformity achievable for wafers upto 200mm(8”) diameter
• Same magnetic pack suitable for different materials (ferro-magnetic targets require different magnetics)
• Consistent coating uniformity throughout target life • All vacuum and water seals are static – no rotation,
hence no wear and leaking with time which maximizes up-time and minimizes maintenance costs
• High power capacity – high flow and directly cooled targets – optional indirectly cooled targets
• RF and Hipims power mode option
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One Magnetic pack for different material
Gencoa FFE300
Cr 2.00%
WTi 1.90%
Ta 1.10%
Cu 1.60%
Uniformity over 200mm @150rpm
FFE 300 Uniformity
0
0.6
1.2
1.8
2.4
0 100 200 300 400
Position (mm)
OD
(au)
Cu
Wti
Cr
Ta
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The SW300 FFE magnet packs create high uniformity with low defects at low
target to substrate separations over static wafers
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Target utilization can also be optimized via the magnetic design within the
constraints of meeting the thickness uniformity spec.
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FFE300 deposition tests
Glass substrate
400 x 230
FFE300 Plasma
Initial tests were carried out with a copper target 11
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Optical Density Measurements
Detector
Samples coated in FFE300 with copper C101
Absorbance/Transmitance based
Aλ= log10 (I0/I) = -log10(T)
Optical density = Absorbance
λ= 550 nm
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Optical Density Measurements
Because the light transmittance decreases exponentially as it travels through the material then the Optical density (OD) is proportional to thickness. For accuracy we would like to be ~ 1 in OD(Transmittance >~ 10%)
Example of FFE300 deposited Ta coating Optical density (@ 550nm) versus the ta thickness as measured by crystal sensors.
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Gencoa 300FFE
Flexible uniformity control
• Three different methods to adjust uniformity
1. Varying rotational speed of the array (50-450 rpm)
2. Adjusting position of the magnetic pack relative to the central axis of rotation – mechanical change
3. Use shunts to tune magnetics – mechanical change
4. Combination of methods 1,2 &3
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The ability to tune uniformity via speed variation is a powerful aid helping the
adjustment of uniformity with target life
SW300 FFE- Uniformity v Rotation speed
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FFE300 Run 3 250RPM NiV
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 5 10 15 20 25 30 35 40
Position, mm
OD
, au
OD
FFE300 RUN 5 200RPM Ti
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0 50 100 150 200 250 300 350 400 450
Position, mm
OD
, au
OD
Examples of different speed settings for different materials to tune uniformity for
NiV, Ti, Cu & AlCuSi to <±2%
FFE300 RUN7 150RPM Cu
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0 50 100 150 200 250 300 350 400 450
Position, mm
OD
, au
OD
FFE300 RUN 9 200RPM AlCuSi
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 50 100 150 200 250 300 350 400 450
Position, mm
OD,
au
Series1
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Adjustments to tune uniformity Varying the location of the magnetic pack.
•Lead screw adjustment can be used to vary the position of the magnetic pack relative to the central axis of rotation.
•Design allows easy accessibility to the lead screw .
Lead Screw
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Adjustments to tune uniformity Varying the location of the magnetic pack.
In-house testing has proved that by moving the array by 2mm, the uniformity measurement over 200mm changed by ±1.68%.
Uniformity at different array position
0
0.2
0.4
0.6
0.8
1
0 100 200 300 400
Position (m)m
OD
(au) Array @ 8mm offset
Array @ 6mm offset
Uniformity over 200m at 8mm offset:-4.95%
Uniformity over 200m at 6mm offset:-3.27%
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Adjustments to tune uniformity Using pre-configured shunts
•In built design features to place pre-configured shunts for ultra fine tuning. •Requires lifting of the magnetic pack from the source.
Location for pre-configured shunts
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FFE300
Typical deposition rate
ffe150
Target Deposition Rate (nm/min/kw)
T-S (mm)
Cr 85.71 60
Ti 57.14 66
NiV(10%) 107 60
Au 280 60
Ni 83.2 60
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FFE300 – Cr target
Uniformity test
ffe150
Target: CrRun No.:
Pressure 3.30E-03RPM 100
Gas (Ar) 45%Shunting N/A
Power 2800WTime 90 sArray Original
Array offset 0
T/S mm 60
S/N S01533-FE-02
Average deposition rate= 240 nm/min
Crystal sensors Quartz-gold
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• Cr deposition rate is >200 nm/min at 2.8 kW
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FFE300 – Ti target
Uniformity test
ffe150
Average deposition rate at 2.8 kW~ 160 nm/min
Crystal sensors Quartz-gold
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• Ti deposition rate is >140 nm/min at 2.8
Target: TiRun No.: 103
Pressure 4.3E-03 TorrRPM 300
Gas (Ar) 65%Shunting none
Power 2800WTime 150 sArray FE-03
Array offset 5
T/S mm 60
S/N S0141-FE-03
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FFE300 – Ni target
Deposition rate test
ffe150
Average deposition rate at 2.8 kW~ 233 nm/min
Crystal sensors Quartz-gold
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• Ni deposition rate is >200 nm/min at 2.8 kW
Target: NiRun No.: 306
Pressure 6.0E-03 Torr
RPM 60Gas (Ar) 30%Shunting N/A
Power 2800WTime 150 sArray h202x1.5c-Hear
Array offset 5
T/S mm 60
S/N S0141-FE-01
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FFE300 – Cr
V/I vs pressure & On/Off tests
• On/off tests @ 2.8 kW & 100 rpm were all on for the pressure range: 2E-3 mbar to 1.0E-2 mbar
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FFE300 – Cu target
Uniformity test
ffe150
Position in mm vs Optical Density
Target: CuRun No.: 002
Pressure 3E-03 TorrRPM 200
Gas (Ar) 45%Shunting N/A
Power 400WTime 31sArray FE-01
Array offset 0T/S mm 60
S/N S01533-FE-02
0.99% over 200mm
Initial tests typically carried out with a copper target.
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FFE300 – Cr target
Uniformity test
ffe150
Target: CrRun No.: 023
Pressure 3.30E-03RPM 100
Gas (Ar) 45%Shunting N/A
Power 400WTime 35sArray FE-01
Array offset 0
T/S mm 60
S/N S01533-FE-02
Position in mm vs Optical Density
1.82% over 200mm
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• Cr uniformity at the beginning of target life is <= +/- 3%
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FFE300 – Cr target
Uniformity test
ffe150
Position in mm vs Optical Density
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• Cr uniformity out at 240 kW.h +/- 1.6%
1.56% over 200mm
Target: CrRun No.: 032
Pressure 2.9E-03RPM 150
Gas (Ar) 45%Shunting
Power 400WTime 35SArray FE-01b
Array offset 5T/S mm 60
S/N S01533-FE-02
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Cr Uniformity over full target life
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FFE300 – Cr target
Final target Profile
ffe150
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• Cr target utilisation (from profile): 38% • Maximum depth from original: 7.5 mm DATA ADJUSTED FROM LASER SCANNING MEASUREMENTS
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FFE300 – Ni target
V / I curves
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FFE300 – Ni target
Uniformity test – November 2014
Position in mm vs Optical Density
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As the target erodes the outer contribution increases, as this is the area of higher erosion depth
3.33% over 200mm
Target: NiRun No.: 308
Pressure 6.0E-03 Torr
RPM 30Gas (Ar) 30%
Shunting N/A
Power 1000W
Time 22 s
Array h202x1.5c-Hear
Array offset 5T/S mm 60
S/N S0141-FE-01
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FFE300 – Ni target
Uniformity test – November 2014
Position in mm vs Optical Density
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Bringing uniformity within spec. With constant current was possible to balance the side to side uniformity.
4.46% over 200mm
Target: NiRun No.: 317
Pressure 6.0E-03 Torr
RPM 60Gas (Ar) 30%
Shunting N/A
Power 2 A (~1.2 kW)
Time 26 s
Array h202x1.5c-Hear
Array offset 12.5T/S mm 60
S/N S0141-FE-01
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Ni Uniformity over full target life
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FFE300 – Ni target
Uniformity test – November 2014
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Ni target profile after erosion: 23.4% target use – 0.6 mm remaining from original 6 mm
Backing plate
Reference points for scanner
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The FFE300 is the most advanced sputter source for static
wafer coating on the market
• Flexible • Unrivalled performance • Standard cathode design usually in-stock • Backed by Gencoa’s process support • Pre-delivery acceptance for specific processes (subject to a charge) • OEM volume annual supply contracts available • Gencoa ffe magnetrons are available from 75mm to 600mm target diameters