Varian
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The Varian EHPI 500 is a medium current ion implanter. The EHPI-500 offers an energy range up to 780 keV. The EHPi-500 supports wafer sizes up to 200 mm.[1][2]

The Varian EHPI 500 is a batch-type medium-current ion implanter. The EHPI 500 supports wafer sizes of 150 mm and 200 mm. The ion energy range is from 5 to 260 keV for singly charged ions, and the system can achieve energies up to 780 keV. By 2001, over 550 units of the E-series medium-current implanters were in production.[2][7][1][6]
In operation, wafers are loaded from a cassette into a load lock, which is evacuated to vacuum. Wafers are then transferred to the process chamber where the batch platen rotates. The ion beam is scanned across the platen to ensure uniform dose. The system can handle singly and multiply charged ions to achieve a wider range of implant energies.
Medium-current implanters such as the EHPI 500 are used to dope semiconductor regions in CMOS logic, memory, and mixed-signal devices. Typical applications include forming lightly doped drains, halo implants, and punch-through stop structures.
Tools documented as functional equivalents — same process step and wafer size, from a different manufacturer. Each equivalence cites its source.
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The following facts about the EHPI 500 are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the EHPI 500 are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the EHPI 500 are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the EHPI 500 are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the EHPI 500 are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the EHPI 500 is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Sep 28, 2026.
The Applied Materials / Varian E 500 HP is an implanter described as a medium current ion implantation system for 8-inch wafers.
The Applied Materials / Varian EHP 500 is an ion implanter for 6-inch wafers.
Applied Materials / Varian VIISta 810 is a 12-inch medium current implanter.
The Applied Materials / Varian VIISta 810 XEri is an ion implanter described as a 12-inch medium current system.