Application Scenarios
A wafer fab operating a fleet of Lam 2300 Exelan dielectric etch chambers for oxide and low-k interconnect processes began noticing a familiar pattern of drift after thousands of wafers. The maintenance team saw the helium backside leak rate climbing slowly, dechuck time stretching from under a second to several seconds, and edge critical-dimension (CD) uniformity widening by a nanometre or two per quarter. The difficulty was that none of these signatures pointed clearly to the ESC: a rising helium leak resembled a gas box or MFC issue, longer dechuck time suggested an ESC power supply fault, and higher particle counts looked like a chamber-clean problem. By identifying and replacing the worn 839-800327-315, the team addressed the root cause directly—restoring wafer flatness, helium sealing, clamping force, and particle performance in one intervention. This case illustrates why the 839-800327-315 is so valuable in a legacy 2300 fleet: it resolves ambiguous chamber drift at the component level and avoids months of lost availability while chasing the wrong subsystem.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | 839-800327-315 |
| Manufacturer | Lam Research Corporation (USA) |
| Product Category | Electrostatic chuck (ESC) assembly – wafer clamping and lower electrode |
| Platform | Lam 2300 series etch systems; confirmed on 2300 Exelan / Versys Metal |
| Wafer Size | 300mm (12-inch) |
| ESC Type | Bipolar, ceramic, embedded big pin |
| Dielectric Material | Sintered ceramic (alumina or aluminium nitride by configuration; verify by revision) |
| Clamping Principle | Electrostatic attraction across a ceramic dielectric (Coulomb / Johnsen-Rahbek; confirm revision) |
| Process Application | Dry plasma etch: dielectric, oxide, low-k, metal films |
| Backside Thermal Control | Helium backside cooling through grooves and sealing lands |
| Approximate Weight | 7.25 kg |
| Cross-Reference | 715-800327-315 (same chuck traded under alternate number) |
| Service Status | Out of OEM production; supplied as new surplus, tested used, or professionally reworked |
Technical Principles and Innovative Values
- Innovation Point 1: Uniform Clamping Without Mechanical Contact – A mechanical edge clamp grips only the wafer perimeter, creates local stress, shadows the touched region, and leaves the wafer centre poorly contacted. The 839-800327-315 distributes holding force across the full 300mm backside, so the wafer sits flat against the temperature-controlled face. In plasma etch, where ion trajectory and local temperature vary by position, this uniform contact is a prerequisite for uniform etching.
- Innovation Point 2: The Chuck Is the Lower Electrode – In the etch chamber, the 839-800327-315 carries the RF bias that drives ions into the wafer surface. Its dielectric thickness, ceramic integrity, and RF return path all shape the plasma sheath directly. This makes the ESC a process component rather than a simple handling part.
- Innovation Point 3: Integrated Thermal Management via Helium Backside Cooling – The chuck face incorporates cooling grooves and sealing lands, allowing helium to transport heat from the wafer backside. Stable wafer temperature during exothermic plasma reactions protects critical dimension control and repeatability.
- Innovation Point 4: Big-Pin Embedded Interface for Repeatable RF and He Delivery – The embedded big pin design provides a robust, precision-aligned connection for RF, heater, and helium paths. This simplifies re-installation and preserves consistent electrical and thermal performance across maintenance cycles.
