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The LAM Address Board, OEM part number 810-017388-003, is a digital control printed circuit board used within the distributed electronics architecture of LAM Research plasma etch and deposition systems. Its core purpose is addressing: it allows the system controller to identify, select and communicate with the correct subsystem node on a shared backplane or communications bus. In a tool that may contain dozens of individually addressable circuit boards, gas controllers, RF modules, temperature controllers, sensor interfaces and motion drivers, the address board is the component that gets each command and each block of data reaches its intended destination and no other.
Physically, the board is a multilayer epoxy-glass (FR-4) PCB carrying digital logic, address decoding circuitry, bus transceivers and a connector interface that mates with the chassis backplane. It typically sits in a card cage or electronics rack alongside the other control boards, drawing regulated DC power from the backplane and exchanging digital traffic over the system bus. Although it carries no plasma, gas or vacuum load directly, the address board is firmly in the critical signal path: if addressing fails, the affected node becomes invisible or ambiguous to the controller, and the tool can no longer trust the integrity of its own command and telemetry traffic.
Because semiconductor process tools demand deterministic, repeatable communication for every wafer, the address board matters far beyond its modest size. A board that intermittently mis-decodes its address, or that fails to release the bus cleanly, can corrupt process sequencing in ways that are difficult to diagnose and that frequently masquerade as faults in other subsystems. Keeping a verified spare on the shelf is therefore a sensible insurance against extended, hard-to-localise downtime.
Within the control electronics of a LAM etch or deposition system, the address board performs the housekeeping functions that let many independent nodes share a single communications backbone without conflict. Its responsibilities typically include the following:
As a digital interface board, the value of 810-017388-003 lies in clean, timing-accurate logic behaviour and reliable physical connection to the backplane. Two performance dimensions dominate its service life.
Correct operation depends on the address decode logic resolving the bus state within the strobe window and on transceivers switching direction without overlap. The board must present well-defined logic thresholds, low propagation skew across address lines and reliable tri-state turn-off so that addressing remains unambiguous as bus loading and temperature vary.
The board relies on clean regulated DC from the backplane and on a low-resistance, mechanically sound edge or header connection. Decoupling, supply integrity and connector contact quality determine whether the digital logic behaves predictably over thousands of insertion and thermal cycles.
Because the address board governs whether commands and telemetry reach the correct node, its condition has consequences that ripple across the whole tool:
Repeated card insertion, vibration and oxidation gradually raise contact resistance at the backplane interface. The result is intermittent address or data lines that produce errors only under thermal or mechanical movement, among the most frustrating faults to chase because they often vanish when the board is reseated for inspection.
Address decoders and bus transceivers can drift or fail after years of thermal cycling and electrical stress, leading to slow edges, marginal logic levels or incomplete tri-state release. A weakened driver may hold a bus line partially active, corrupting transactions intended for other nodes.
Vibration and age can loosen address jumpers or switches, silently changing the node identity, while thermal fatigue can crack solder joints at heavy connectors and high-pin-count devices. Both manifest as a node that intermittently appears at the wrong address or drops off the bus entirely.
Replacement should always be carried out by suitably trained personnel following the relevant LAM service documentation and your site’s lockout/tagout and ESD procedures. A typical sequence is as follows:
Addressing and bus interface boards are exactly the kind of low-visibility component that is easy to overlook in a spares plan yet capable of causing disproportionate downtime when it fails. Sourcing a verified replacement such as ESCT P/N R-ES2022-144 offers practical advantages:
It decodes the address presented on the system backplane and selects the correct subsystem node, so that commands and telemetry on the shared bus reach their intended destination and that each board responds only when its own address is matched.
No. This board is supplied as a reconditioned, OEM-compatible replacement cross-referenced to LAM part number 810-017388-003. It is verified to form, fit and function but it is not an original OEM part and is not sold as one.
Typical symptoms include bus time-outs, “node not responding” errors, intermittent communication faults that move with temperature or vibration, or commands appearing to act on the wrong subsystem. Because these can mimic other faults, confirm by reseating, inspecting the connector and verifying the configured node address.
Usually yes. Address boards carry node identity settings via jumpers, switches or programmable identifiers. Record the original settings before removal and replicate them exactly on the replacement so the node enumerates at the correct address.
Treat it as a static-sensitive device. Power down and lock out the rack, use a grounded wrist strap and ESD-safe surface, handle the board by its edges and insert or withdraw it squarely to avoid bending backplane connector pins.
It is used in the distributed control electronics of LAM Research plasma process systems. If you are unsure whether 810-017388-003 matches your tool, quote the OEM part number and your system details to our team and we will help confirm suitability before you order.
The LAM Address Board (OEM P/N 810-017388-003, ESCT P/N R-ES2022-144) is a digital addressing and bus interface PCB that lets the many control nodes of a LAM plasma process system share a single backplane without conflict. Though small and easily overlooked, it sits squarely in the command and telemetry path, and its reliability directly affects communication integrity, process repeatability and uptime. ESCT Fab Support offers this board as a reconditioned, tested replacement that is verified to form, fit and function, making it a practical, budget-conscious spare for both current and legacy LAM electronics racks.
Disclaimer: This part is supplied by ESCT Fab Support as a reconditioned, OEM-compatible component, verified to the form, fit and function of Lam Research part number 810-017388-003. It is not an original OEM part and is not sold as one. It is not manufactured by, endorsed by, or affiliated with Lam Research, and all manufacturer names and part numbers are quoted for identification and compatibility purposes only.
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