Implant

Process Overview Ion implantation precisely introduces dopant atoms into the semiconductor to modify electrical properties. Think of it as shooting atoms into the silicon wafer like a highly precise

### Process Overview Ion implantation precisely introduces dopant atoms into the semiconductor to modify electrical properties. Think of it as shooting atoms into the silicon wafer like a highly precise atomic gun. ### Equipment Types #### High-Current Implanters - Manufacturers: - Applied Materials (VIISta® HC) - Axcelis (Purion H™) - Cost: $3-6 million - Applications: High-dose implants - Beam current: 10-40 mA - Energy range: 2-80 keV #### Medium-Current Implanters - Manufacturers: - Applied Materials (VIISta® MC) - Axcelis (Purion M™) - Cost: $4-7 million - Applications: Well implants - Beam current: 100-1000 µA - Energy range: 30-400 keV #### High-Energy Implanters - Manufacturers: - Axcelis (Purion XE™) - AIBT - Cost: $5-8 million - Applications: Deep implants - Energy range: 400 keV-7 MeV ### Ion Sources & Materials #### Common Dopants 1. P-type: - Boron (B11) - BF2 - Cost: $500-2000/cylinder 2. N-type: - Phosphorus (P31) - Arsenic (As75) - Cost: $1000-3000/cylinder #### Suppliers - Air Liquide - Praxair - Matheson Tri-Gas - Inventory cost: $100,000-500,000/year ### Facility Requirements - Class 100 cleanroom - Radiation shielding - Ion source gas handling - Cooling water systems - Power: 100-300 kW/tool - Setup cost: $10-20 million ### Technical Parameters - Dose range: 1E11 to 1E16 atoms/cm² - Energy range: 0.2 keV to 7 MeV - Dose accuracy: ±1% - Uniformity: <±1% - Throughput: 200-400 wafers/hour - Tilt angle: 0-60 degrees ### Market Analysis - Market Leaders: - Applied Materials (~50%) - Axcelis (~40%) - Others (~10%) - Market size: ~$1.5B annually - Growth drivers: Power devices, image sensors ### Support Infrastructure 1. Cooling Systems - Manufacturers: SMC, Lytron - Cost: $200,000-500,000 2. Gas Distribution - Cost: $300,000-700,000 - Annual maintenance: $50,000-100,000 3. Safety Systems - Radiation monitors - Gas detectors - Emergency shutdown - Cost: $100,000-300,000 ### Technical Challenges 1. Advanced Nodes: - Ultra-shallow junctions - Damage control - Channeling effects - Precise dopant placement 2. Production: - Source lifetime - Beam stability - Cross-contamination - Throughput optimization ### Future Trends - Plasma doping (PLAD) - Molecular implantation - In-situ metrology - AI/ML control systems ### Maintenance Requirements - Source replacement: 100-500 hours - Preventive maintenance: Monthly - Annual cost: $300,000-700,000 - Downtime: 5-10% ### Key Applications 1. Logic Devices: - Well formation - Channel engineering - Source/drain formation 2. Memory Devices: - Isolation regions - Buried layers - Threshold voltage adjustment 3. Power Devices: - Deep implants - High-energy applications

By Eduarda Ferreira