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CVD(Chemical Vapor Deposition)

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Title: CVD(Chemical Vapor Deposition)


1
CVD(Chemical Vapor Deposition)
  • CVD(Chemical Vapor Deposition), ?????? ?????
  • ?? CVD??? ???? ?? CVD??? ??? ???? ? ??? ????
    ??? ?????? ??? ??? ??. ??? CVD?? ??? ???? ???
    ???? ??? ??? ?? ?? ??? ???? ?? ??? ?? ?? ? ???
    ????? ?? ?? ? ?? ????.
  • ??? ??? ????? ?? ?? ?? ??? ?? ? ??? ?? ?????
    ????? ???? ??? ??? ??? ?? ? ? ?? ???.
  • ??? ??? ??? ?? ?? ??? ?? ??? ????.

Fig.1 ??? ?? ????? ??
Cleaning??
Wet, Dry
RTP??, Furnace??, Anneal ?
??? ??
?? ???, ????, ?? ????
Doping ??
????? ??,CVD,PVD,SOG,??? ?
???? ??
???? ??-??,???,??,??,?? ????-?????,???? ????-???,?
??,X? ?
????? ??
CMP,??? ?
??? ??
1
2
CVD(Chemical Vapor Deposition)
??1.?? ? ? ?? ?? ?? ? ???? ???? ?? CVD??? ?????
?? ?? ? ??? ???? ??? ?? ???? ?? ???? ??? ????.
??? ?? CVD? ??????? ?? ??? ?? ??? ??? ??? ??? ??
??? ?????? ?? ?? ?? ?? ?? ?? ? ??? ??,????? ???
??? ?? ????. ??? ??????? ?? ??? ?? ??? ??? CVD
(Chemical Vapor Deposition ??????? )?
PVD(Physical Vapor Deposition ??? ????)? ?? ?
??. ?? ???? ??? ???? ??? ????? ?? ??, ????
Cu(??)??? ??? ?? ???????? ?? ?? ??? ? ??? ??? ???
??? 2?? ?? ??? ????? ???? ? ???. ??? ?????, ?
????? ?? ??? ??? ???.
Fig.2 ?????? ?? ??
??CVD
APCVD
??CVD
LPCVD
CVD?
???? ?? CVD
PECVD
? ??CVD
Photo CVD
? ? ? ? ? ? ? ?
Sputtering
Al,Al??,Silcide,??? ???
PVD?
Evaporation
Al,Al??
Ion Plating
2
3
CVD(Chemical Vapor Deposition)
?????
??? ? ??
??.???
?.??
SOG, ???? ?? ??
?????
Cu?
?? ?? ?? ????? ??? ? ?? ??? ??? ???? ? ??
CVD??? ???? ??, ??? ?? ???????? ??, ???? ???? ???
??? ??. ??? ??? ?? ??? Fig.3 ? ?????. ??? ?? ?,
?????? ???,??(???),????? ? ??? ??? ??? ???? ?? ??
?? ??? ?? ??. ?? ??? ????? ??? ??? ??? ??? ???
????? ?? ?? ??? ??? ?? ?? ??. CVD??? ?? ?? ???
???? ??? ???? ???(FRAM)? ?? ??? ???? ????
Capacitor???? ????? ?? ?? ??? ????? ?? ?? ???? ??
??? ???.
3
4
CVD(Chemical Vapor Deposition)
Fig.3 ?? ??? ?? ??
Undoped???(SiO2USG)
Si ???
Doped???(PSG,BSG,BPSG)
?? Doped???(FSG)
Si3N4
Si???
? ? ?
Si3Nx(???? CVD? ?? ?)
SiON(?? ??????)
Low k ????
??? ??, H?? SiO2. Porus Sio2?
Ta2O5
? ? ? ? ?
Low k ????
BST(??? ??.?????0
STO(??? ?????)
???? ?
PZT,PLZT?
4
5
CVD(Chemical Vapor Deposition)
????.???? ???
Al-Si,Al-Si-Cu,Al-Cu?
? ? . ? ? ?
??? ???
W,Mo,Ti,Co?
????? ?
WSi2,MoSi2,TiSi2,CoSi2,TaSi2?
??? ???
TiN,TaN?
TiN,TaN?
Cu??
Cu
??
FRAM?? ??? ??- Ir,Pt,Ru2O ?
? ? ? ?
????? ?
??????
Doped ? Undoped?
???? Si?
????? CVD???? ??????? ??? ???? ????? CVD? ??,
??? ?? CVD? ??? ?? ?? ??? ???.
5
6
CVD(Chemical Vapor Deposition)
2. CVD? ?? ? ?? CVD? ?? ? ?? ??? ? ??.
? ?? ??? ?? ???? ?? ??? ?? ???? ?? ????? ????
???? ??? ??? ?? ??? ?? ???? ????? ???? ??? ???.
??? ????? ??? ?? ??? ??.
a (Gas) ß (Gas)
A (Solid) B (Gas)


By-Product
?? Energy (? ,???? , ? (UV or LASER), ?? ??? ???)
Gas ???
???
???
Energy?
?, ??? ??? ??? ?? Substrate(??)? ?? ?? Gas????
??? ??? Gas? ???? Energy??? ??? Energy(? ,????
, ? (UV or LASER), ?? ??? ???)? ??? ??, ???? ???
??? ???? ???? ??? ??? ????? ?? ???. ?? ?? ???
?? ?? ??? ??? ??? ???? ?? ?????? ?? ???? ???? ???
?? ?? ?? ?? ????(Gas Phase Reaction)?? ?? ?????
?? ??? ??? ??? ??? ?? ?? ??? ????? ??? ???? ??
??? ?? ??? ?? ?? ?????? ???? ?? ???. ?? ??? ???
????? ???? ?? CVD? ??(Oxidation)? ?? ??? ????
??? ?? ???? ???? ??? ?? ?? ??? ??? ???.
6
7
? ???? ??? ??? ??????? CVD???? PVD, ?? ??? ?? ??,
???? ?? ??? ??? ????? ??? ?? ?????? ??? CVD??
??? ??? ????.
  • 3. CVD?? ??
  • 1) ????? ??? ???,??,???,??
    ???? ??? ? ?? ??? ??.

  • ?? ??,??,??,Bulk? ??? ????? ?? ? ???,

  • ??? ???? ????? ?? ?????? ????????

  • ??? ?? ????? ??? ?? ?? ?? ?????? ??? ??.
  • 2) ??? ??? ??? ?? ??? ??? ??? ???? ???
    ??? ??? ??

  • ??? ??? ??? ????? ?????? ????? ???? ??.
  • 3) ??? ???? ?? ????? ?? ?????
    ???? ??? ?? ??? ???

  • ??? ??? ????? ??? ????.
  • 4) ??? ?? ?? ??? ??????
  • 4. CVD?? ??
  • 1) Coating ??? ?? substrate ???? ???? ?.
  • 2) ??? ?? ???? ????? ??? ???? ?.

7
8
5. CVD ??? ????
????
?? ???
????
??? ??
Lamp ??
???
Hot Wall
?
?
?
Batch Type
Cold Wall
?
?
?
???
?
?
?
?? ??
?
?
?
?? ???
CVD??
Gas ???
?? ??? MFC (Mass Flow
Controller)
Cylinder / Tank /???
Energy??? (????,????)
?? ??? Energy??? ???? ???
?? ??? ????,??? ??,???? ??? ??(13.56MHz?),???
???
??? ???? ????
(Rotary Pump,Dry Pump) (???? ??)
8
9
  • 6. CVD System ? ??
  • ???? ????? ?? LPCVD ( Low Pressure CVD )
    ? APCVD (Atmospheric Pressure CVD )? ??
  • ? ? ???, ????? ?? ???? ?? Thermal, Plasma,
    Photon, Laser CVD? ????, ?? ????
  • ?? ?? ?? Hot Wall, ???? ??? ????? ???? Cold
    Wall???? ?? ? ? ???, ????
  • ?? ??? ???, ???, Barrel?, ???, ??? ???, ???
    ??? ??? ??? DCVD(Dielectric CVD)
  • ,MCVD(Metal CVD)???, ????? ?? ??? MOCVD(Metal
    Organic CVD),MICVD(Metal Inorganic CVD)?,
  • ? ???? ?? ??? ???? ??? ???? ALD(Atomic Layer
    Deposition)??? ???? ?? ???
  • ?? ???? ?? ? ? ??.

CVD Reactor Parameters
Parameters
Variations
Temperature range
Low, Medium, High
Deposition Pressure
ATM, Low
Reactor geometry / Wall temp.
Hot wall, Cold wall
Energy Source
Temp. , R.F , UV-light
Deposition film
Dielectric , Metal
Reactant / Carrier gases
Metal Organic, Inorganic
9
10
Fig. 4 CVD System ? ??
CVD
APCVD
LPCVD
Thermal CVD
PECVD
Photon CVD
Thermal CVD
Hot Wall
Cold Wall
Hot Wall
Hot Wall
Cold Wall
Cold Wall
???
???
???
???
???
???
???
10
11
CVD?? ?? ?
?? ??
?? Parameter
Thermal CVD
Reactor? ??? ????? ?? ? ?? ??? ????? ??
Plasma Enhanced CVD? Reactor? ????? ???
??? Plasma??? ???? ??? ???? ???? Thermal CVD ??
???? ????? ???.

PE CVD
????
Laser?? ???? ?? ????? ????? ?? ? ??? ??? ??
Photo CVD
AP CVD
Atmospheric Pressure CVD

??
??
LP CVD
Low Pressure CVD
Metal Organic CVD? ???? ????? Metal??? Carbon,
???? ???? ???? ???? ??. ????? ???? ??? ???? ???
????? ?? Reactor? ????.
MOCVD
????
Ex) 2Ta(OC2H5)5 O2 -gt Ta2O5(s) Others
11
12
?? CVD?? ??? ? ????
Process
Advantages
Disadvantages
Applications
- Simple reactor
APCVD
- Poor step coverage
- Low temp oxides, both
- Fast deposition
(Low Temp)
- Particle contamination
doped and undoped
- Low temperature
- High temp oxide
- Excellent purity uniformity
- High temperature
- Silicon nitride
LPCVD
- Conformal step coverage
- Low deposition rate
- Poly-Si
- Large wafer capacity
- W, WSi2
- Low temperature
- Chemical and particle
- PMD(pre metal dielectric)
PECVD
- Fast deposition
contamination
- Passivation nitride
- Good step coverage
12
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