The new Cleanroom extension was designed to interface with the original suite to utilise common gowing facilities.

Being the cleanest area in the suite, the new ISO Class 5 area was designed to be +10Pa with respect to the adjacent ISO class 6 space.

Cleanrom Structure

• To minimise installation time, the Cleanroom envelope was designed as a pre-engineered, self-supporting structure. Wall modules were formed from extruded aluminium profile with aluminium faced composite infill panels.
• The existing parent building floor slab was screeded and anti-static sheet vinyl was laid. The vinyl flooring created a sel-form cove detail at the wall/floor interface, Butt joints in the sheet vinyl were thermally welded to create an essentially monolithic finish.
• The ceiling was formed from walkable extruded aluminium tee grid suspended on drop-rods from the self-supporting clear span ties beams.
• The ceiling grid housed FFM (fan HEPA filter modules) and infill tiles. The plenum lid was formed from foil face insulation board.

Mechanical Services

• Air was supplied into the Cleanroom via ceiling mounted EC (electronically commutated) H14 FFM from the supply plenum. A proportion of air was recirculated via low-level return air grilles in the return air riser, back into the supply plenum, where it mixed with a portion of pre-filtered make-up air.
• Cooling was provided via monobloc DX (direct expansion) cooling units to offset the process and make-up air heatgain,.

Electrical Services

• Electrical power was provided from a new local DB (distribution board) to, teardrop light fittings, socket outlets, FFMs and monobloc DX units.
• To protect the photolithography process from UV (ultra-violet) light, the door vision panels were fitted with amber UV control film and teardrop lighting was fitted with 500nm wavelength LEDs.