Secs/gem are communication protocols for semiconductor equipment and fab hosts that enable standardized control and monitoring of manufacturing processes. The protocol allows actions such as starting/stopping processing, recipe management, and alarm systems, benefiting both manufacturers and suppliers with common behavior definitions. While primarily used in semiconductors, secs/gem has also seen adoption in other industries like photovoltaic manufacturing.

1. -:SECS/GEM:-
SECS (SEMI Equipment Communications Standard)/GEM (Generic Equipment Model)
are communication interface protocols for communication between a semiconductor
equipment and a fab host. Fab host is a software application that is controlling and
monitoring equipment processing using SECS/GEM protocol. SECS/GEM compliant
equipment can communicate with the fab host using either TCP/IP (using SEMI
standards E37 and E37.1 – HSMS) or RS-232 (using SEMI standard E4 – SECS-I). The
SECS/GEM standard interface is used to start as well as stop equipment processing,
collect measurement data, select recipes for products and change variables. With
SECS/GEM, all this can be performed in a standard way. SECS/GEM protocol has been
standardized by the non-profit association SEMI (Semiconductor Equipment and
Materials International). Check www.SEMI.org to learn more about SEMI standards
and SECS/GEM protocol.

2. In simple words, the SECS/GEM standard defines messages, state machines and scenarios to
enable factory host applications to control as well as monitor manufacturing equipment. GEM
standard is officially designated as SEMI standard E30, but frequently referred to as the GEM
or SECS/GEM standard. The GEM is beneficial for both device manufacturers and equipment
suppliers as it defines common set of equipment behavior and communication capabilities to
provide functionality as well as flexibility to support manufacturing. Since GEM standard has
only a few semiconductor-specific features, it has been adopted by other manufacturing
industries as well, such as PV.
Among the capabilities offered by the SECS/GEM standard is –
 For fab host to start and stop processing
 For fab host to select, download and upload recipes from/to the equipment
 For fab host to query the equipment for values of various process parameters and
equipment configuration
 For fab host to set equipment configuration parameter values
 For equipment to send alarms to the fab host
 For fab host to define reports of various variables and associate them with events such
as lot start or wafer complete
 For equipment to send various events and associated reports to the fab host
More information:- https://www.einnosys.com/introduction-secs-gem/