AMEC (Advanced Micro-Fabrication Equipment Inc.) Etching Equipment

CCP (Capacitively Coupled Plasma) and ICP (Inductively Coupled Plasma) etching systems serve different applications: CCP is primarily used for dielectric etching (oxide, nitride, low-k materials) where high selectivity to silicon and anisotropic profiles are required. CCP provides excellent uniformity across the wafer and is the industry standard for contact and via etching. ICP is used for silicon etching, metal etching, and applications requiring independent control of ion density and ion energy. ICP offers higher plasma density and better control for deep silicon etching and high aspect ratio structures. AMEC offers both CCP and ICP platforms optimized for their respective applications. Some advanced systems combine both technologies for maximum flexibility.

Use CCP for dielectric etching. Use ICP for silicon and metal etching. Consider dual-source systems for maximum flexibility.

Chamber configuration selection depends on several factors: 1) Throughput requirements - single chamber for R&D or low-volume, multi-chamber cluster tools for high-volume production. 2) Process complexity - simple processes may use single chamber, complex processes requiring multiple etch steps benefit from multi-chamber configurations. 3) Process compatibility - some processes cannot share chambers due to contamination concerns. 4) Footprint constraints - cluster tools require more cleanroom space but offer higher productivity. 5) Budget considerations - cluster tools have higher capital cost but lower cost per wafer. AMEC offers standalone chambers, twin-chamber configurations, and multi-chamber cluster tools. Our FAE team can help analyze your process flow and recommend the optimal configuration for productivity and cost.

Analyze throughput, process complexity, and budget to select chamber configuration. Contact FAE for configuration optimization.

Critical dimension (CD) control refers to the ability to maintain precise feature sizes during etching. CD control is crucial because: 1) Device performance - transistor dimensions directly affect electrical characteristics including speed and power consumption. 2) Yield - CD variation can cause device failures or performance variations. 3) Multi-patterning - advanced nodes use multiple patterning steps where CD errors compound. 4) Overlay - etched features must align precisely with underlying layers. AMEC etching systems achieve excellent CD control through: advanced plasma uniformity, precise process control algorithms, temperature control, and real-time monitoring. Typical CD uniformity specifications are +/- 3% or better across the wafer. For advanced nodes, atomic-level precision is required.

Specify CD control requirements based on technology node. AMEC systems provide excellent CD control for all technology nodes.

Etch selectivity is the ratio of etch rates between the target material and mask or underlying materials. High selectivity is important because: 1) Mask preservation - high selectivity to photoresist allows thinner resist layers, improving resolution. 2) Stop layer protection - high selectivity to underlying layers prevents over-etch damage. 3) Profile control - selectivity affects etch profile and sidewall characteristics. 4) Process window - high selectivity provides larger process windows and better tolerance. AMEC etching systems achieve high selectivity through: optimized chemistry, plasma conditions, and proprietary hardware designs. Typical selectivities range from 5:1 to 100:1 depending on materials and process requirements. Process development optimizes selectivity for each specific application.

Define selectivity requirements based on film stack and process window needs. AMEC systems offer excellent selectivity performance.

Etch rate and uniformity are affected by multiple factors: 1) Plasma parameters - power, pressure, gas flow rates directly affect etch rate and uniformity. 2) Temperature - wafer and chamber temperature affect reaction rates and uniformity. 3) Gas chemistry - different chemistries provide different etch rates and selectivities. 4) Hardware configuration - electrode design, gas distribution, and chamber geometry affect plasma uniformity. 5) Process monitoring - real-time monitoring enables active uniformity control. AMEC systems optimize these factors through: advanced plasma source design, precise temperature control, sophisticated gas delivery systems, and intelligent process control. Uniformity specifications typically range from +/- 3% to +/- 5% depending on application requirements.

Work with AMEC applications team to optimize etch rate and uniformity for your specific process requirements.