0090-90167
wCHAS ASY PWR UNIT FOCUS

Focus power unit chassis assembly (OEM P/N 0090-90167), power distribution sub-assembly for Applied Materials ion implantation systems

ESCT P/N ES3033-150, wired chassis assembly for the focus power unit

The Focus Power Unit Chassis Assembly, supplied under Applied Materials (AMAT) OEM part number 0090-90167 and stocked by ESCT Fab Support as ES3033-150, is a wired power chassis (“wCHAS ASY PWR UNIT FOCUS”) that forms the mechanical and electrical backbone of the focus power unit used within AMAT ion implantation platforms. The abbreviated descriptor decodes to “Wired Chassis Assembly, Power Unit, Focus”, in other words, a pre-populated sheet-metal enclosure carrying the wiring harness, busbars, connectors and mounting provisions for the power electronics that energise the beam focusing elements of the implanter.

In an ion implanter, the extracted ion beam must be electrostatically focused and shaped as it travels from the source through the beamline towards the wafer. The focus power unit provides the regulated, often high-voltage, supply rails that drive the focus and suppression electrodes. The chassis assembly is the structural host for those rails: it locates the power modules, routes the internal harness, supports the interconnect bulkheads and provides the grounding and shielding reference that keeps a high-voltage subsystem safe and electrically quiet inside a densely packed equipment bay.

Because it is a wired assembly rather than a bare panel, ES3033-150 arrives with the cable looms, terminal blocks and connector shells already dressed and routed to the OEM configuration. That distinction matters: a correctly wired chassis preserves the exact harness routing, segregation and strain relief that the original engineering intended, eliminating a major source of rework, mis-wiring and intermittent faults that arise when a power unit is rebuilt from loose components in the field.

Functional role of the focus power unit chassis in Applied Materials implanter platforms

The wired chassis assembly performs several interlocking duties that together allow the focus power electronics to operate reliably within the tool’s control and safety architecture:

• Provides the rigid, dimensionally controlled frame that locates the focus power modules, transformers and filter components in their intended positions within the equipment bay.
• Carries the pre-routed internal wiring harness that distributes AC input, DC rails and control/interlock signalling between sub-assemblies.
• Establishes the chassis ground and shielding reference plane that keeps high-voltage focus supplies safe and minimises radiated and conducted electrical noise.
• Presents the connector bulkheads and terminal interfaces through which the focus unit mates with the wider beamline power and control wiring.
• Supports creepage and clearance separation between high-voltage and low-voltage wiring to maintain insulation integrity.
• Integrates strain relief, cable clamps and segregation features that protect conductors from vibration, abrasion and thermal cycling over service life.

Electrical and signal performance

As a wired power chassis serving a focus supply, ES3033-150 must combine sound mechanical construction with disciplined electrical practice. Two characteristics dominate its in-service behaviour.

High-voltage integrity and insulation

Focus electrodes are driven at elevated potentials, so the chassis harness and its terminations are specified for the relevant insulation class with deliberate creepage and clearance distances. Maintaining these distances, along with clean dielectric surfaces, is what prevents tracking, corona and flashover.

• High-voltage rated conductors, sleeving and stand-offs sized for the focus supply voltages.
• Segregation of HV wiring from low-level control and interlock circuits to limit coupling.
• Secure, low-resistance terminations that resist loosening under thermal and vibration cycling.

Grounding, shielding and signal quality

A stable ground reference and effective shielding keep focus regulation accurate and the beam stays stable. The chassis provides the bonding paths and shield terminations that hold the noise floor low.

• Low-impedance chassis bonding to the tool safety earth via the OEM mounting and grounding studs.
• Defined shield drain and cable screen terminations to control conducted interference.
• Connector keying and pin assignment matched to the OEM configuration for correct mating.

Impact on tool performance and yield

The focus power chain has a direct line to wafer-level results, because a poorly focused or unstable beam translates into dose and uniformity errors. A degraded or incorrectly wired chassis assembly can therefore have consequences that reach well beyond the equipment bay:

• Unstable or drifting focus voltages that broaden the beam and degrade dose uniformity across the wafer.
• Intermittent high-voltage faults or arcing that trip interlocks and force unscheduled tool downtime.
• Beam transmission losses and increased beamline contamination from a defocused or misaligned beam.
• Spurious noise coupling into control signals, producing false faults and difficult-to-diagnose process excursions.
• Reduced mean time between failures for the focus power unit, increasing maintenance burden and scrap risk.

Common failure modes

High-voltage insulation breakdown

Over time, dust, moisture and the by-products of repeated arcing can contaminate insulating surfaces, eroding creepage margins until tracking and flashover occur. This commonly appears as intermittent HV trips that worsen with humidity or after long idle periods.

Loose or degraded terminations

Thermal cycling and vibration gradually relax crimps, screw terminals and connector contacts, raising contact resistance and creating localised heating. The resulting voltage drops and hot joints produce erratic focus behaviour and, in severe cases, charred terminals.

Harness damage and connector fatigue

Conductor insulation can chafe against sheet-metal edges where strain relief has failed, and repeated mate/de-mate cycles fatigue connector shells and latches. Both lead to intermittent open circuits, shorts to chassis or unreliable interlock continuity.

Installation and replacement guidance

Replacement should be carried out only by personnel trained on AMAT implanter high-voltage systems, following the relevant OEM service documentation and site lock-out/tag-out procedures. The following sequence outlines the typical workflow:

• Place the tool in a safe state, isolate and lock out all power sources, then verify zero energy and discharge any high-voltage storage before access.
• Label and photograph all connectors, harness routing and ground bonds before disconnection to preserve the original configuration.
• Disconnect input, output and control/interlock connectors, then release cable clamps, strain reliefs and the chassis mounting hardware.
• Remove the existing chassis assembly and transfer any reusable modules only where the OEM procedure permits.
• Install ES3033-150, securing it to the OEM mounting points and re-establishing the chassis ground bonds to the specified torque.
• Reconnect all harnesses per the labelling, confirm connector keying and seating, and restore strain relief and HV/LV segregation.
• Perform insulation, continuity and ground-bond checks, then power up under controlled conditions and verify focus voltages and beam stability before returning to production.

Spare parts strategy for Applied Materials ion implanters

Focus power faults are among the more disruptive implanter failures, because diagnosis is time-consuming and a stranded tool ties up useful cleanroom capacity. Holding a verified chassis assembly such as ES3033-150 converts a lengthy field rebuild into a confident swap-out. ESCT Fab Support offers several advantages for this class of part:

• Cross-referencing to AMAT OEM P/N 0090-90167 so the correct wired configuration is identified with confidence.
• Components verified to form, fit and function against the original specification before despatch.
• A cost-effective alternative to OEM list pricing that helps control maintenance budgets.
• Specialist focus on legacy and current AMAT implanter subsystems, supporting tools that may be beyond standard OEM stocking horizons.
• Support for spares pooling and planned-maintenance stocking to reduce mean time to repair.

Frequently asked questions

What exactly does this part do in the implanter?

It is the wired chassis assembly for the focus power unit, the structural enclosure that hosts the power modules and wiring which energise the beam focusing electrodes, providing mounting, harness routing, grounding and shielding for that subsystem.

Is this an original Applied Materials part?

No. ES3033-150 is supplied as an OEM-compatible part that is cross-referenced to AMAT OEM P/N 0090-90167 and verified to form, fit and function. It is not an original OEM part and is not supplied as an Applied Materials branded item.

Why choose a wired chassis over rebuilding from loose parts?

A pre-wired chassis preserves the OEM harness routing, segregation and strain relief, which eliminates a major source of mis-wiring and intermittent faults and markedly shortens the time to return the tool to production.

What symptoms suggest the focus chassis assembly is at fault?

Typical indicators include intermittent high-voltage trips, drifting or unstable focus voltages, degraded beam uniformity, and spurious interlock or noise faults that worsen with humidity, vibration or temperature change.

Who should install this assembly?

Installation should be undertaken only by technicians trained on AMAT implanter high-voltage systems, working to the OEM service documentation and site safety procedures, given the elevated voltages present in the focus supply.

How should the part be verified after installation?

After fitting, carry out insulation, continuity and ground-bond checks, then power up under controlled conditions and confirm that the focus voltages and beam stability meet specification before resuming production.

Summary

The Focus Power Unit Chassis Assembly (AMAT OEM P/N 0090-90167, ESCT P/N ES3033-150) is the wired structural and electrical foundation of the focus power subsystem in Applied Materials ion implantation systems. By providing precise mounting, OEM-matched harness routing, solid grounding and high-voltage insulation integrity, it keeps the beam focusing supply stable and safe, directly protecting dose uniformity, beam transmission and overall yield. Sourcing a verified assembly from ESCT Fab Support shortens repair time and offers a cost-effective route to keeping legacy and current implanters running.

Disclaimer: This part is supplied by ESCT Fab Support as a new, OEM-compatible second-source component, verified to the form, fit and function of Applied Materials part number 0090-90167. It is not an original OEM part and is not sold as one. It is not manufactured by, endorsed by, or affiliated with Applied Materials, and all manufacturer names and part numbers are quoted for identification and compatibility purposes only.

Related parts

• 0090-90217 Focus Resistor Unit
• 1140-00265, HV Unit
• 3620-90080, wPump UNIT FOR FREON FREE H/EX
• 0090-90215 wCHAS WRD INVERTER FOCUS
• –, Post-Accel Inverter Unit
• 0090-91415 FOCUS Power Supply
• 0010-10106 VDS FACILITY COMPONENTS INTERFACE UNIT
• 0200-35623, SILICON FOCUS RING