Page 18 - ISCC'22

25 th INTERNATIONAL S YMPOSIUM
October 11-13, ON CONTAMINATION CONTROL AND
Antalya TURKIYE | 2022 CLEANROOM TECHNOLOGY
18

of the room is occupied by a kind of meeting room with tables and chairs. In the sepa-
rate quarter of the test environment, a second setting was set up, which reproduces
an office of 25 to 30 square metres. Among other things, this cleanliness-controlled
reference environment is used to test how mobile and permanently installed ventilation
systems affect the spread of infectious SARS-CoV-2 aerosols.
Aerosol dispersal is evaluated in the test environments produced by the CAPE system.
On the one hand, di-ethyl hexyl sebacate aerosols were generated and atomised so
that the particle dispersion clouds could be evaluated.
In the second test environment, the office, the experts evaluate virus depletion. The
viruses are analysed before and after air pollution control measures in terms of their
activity and quantity. In this way, conclusions can be drawn about necessary adjust-
ments to the ventilation systems or inactivation steps. The integrated UVC irradiation
enables the biological decontamination of the test room in order to return the room to
its defined original state after each test. In addition, chemical by-products are measured
in the test environment, which are filtered out again after their measurement by means
of integrated ACC filtration units in the FFUs of the CAPE system.
3.2 Maintenance-CAPE – for maintenance work during ongoing
cleanroom production
Especially in the semiconductor industry, which on the one hand has the highest re-
quirements for absence of contamination of any kind, and on the other hand cannot
accept longer downtimes, maintenance concepts must be developed that take these
CAPE –
two aspects into account.
FLEXIBLE,
The CAPE sytem has been further developed here in a special contamination-free
PORTABLE,
variant that can be set up for neighbouring production areas and is fully operational
CLEANROOM within just a few minutes (see figure 5, right side). This stem is the enabler for contami-
SYSTEM nation-free maintenance work. The textile CAPE walls represent the spatial demarcation
to cleanliness-sensitive areas and serve to remove contamination caused by mainte-
nance work or repairs. As a result, high-cleanliness environments are not polluted by
particles, liquids, lubricants or chemical contaminants, and subsequent time-consuming
and costly cleaning is not necessary. The maintenance area is integrated by means
of low-contamination rail systems in the ceiling area, so that different positions can be
approached for maintenance work. It’s a user-friendly system, as for the commissioning,
the frame is lowered, textile webs are hung on the floor and then pulled up. This leads
to a space-saving construction and seamless integration into existing systems.
This textile maintenance system can be used in the cleanliness classes with the highest
requirements, ISO class 1. Potentially generated contamination from the construction
materials used in their operation is also contained and removed in a controlled manner
by a negative pressure system inside the CAPE. The CAPE is always designed as a
customised solution, individually adapted to the user requirements in different sizes
and designs.
3.3 Quarantine-CAPE – for temporarily isolating patients,
for example in the event of a pandemic
Cleanliness-capable single-person quarantine system consisting of a flow-through,
textile multilayer system for a tent-like room enclosure. This provides protection against
epidemiological spread of viruses. The system has a tridirectional barrier effect:
f protection of a quarantined patient in the interior against microbiologically contam-
inated outside air,
f protection of persons in the surrounding area and
f prevention of contamination carry-over between interior and exterior.
Figure 7; Quarantine-CAPE. Left side: single-person system. Right side: chained
system for a large number of single-quarantined patients
This ensures maximum protection for patients, operators, service staff and doctors (see
figure 7, left side). In the context of pandemic situations, very short assembly/disassem-
bly times and commissioning within a few minutes are important. The implementation