October, 2019
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Page 69
Designing Human-Machine Interfaces for Electronics Production Systems
By John J. Pannone, Vice President of Sales, HMI Systems/Key Customer Management, North America, EAO Corporation A
s production equipment manufacturers face growing complexity and strive to meet demand for semiconductor miniaturization,
their equipment is challenged by short ROI cycles and requirements for efficiency. From pick-and-place assembly systems to
automated semiconductor systems in fabrication facilities, human-machine interface (HMI) systems are critical to controlling the functions directly impacting the bottom line in the semiconductor and electronics manufacturing industry. A well- designed HMI should provide superior functionali- ty and interactivity for the user, increasing ease-of-use and improving productivity.
Defining Functional Requirements
The tools needed for effective
control and efficient operations of production equipment should be determined by what interface func- tions are most important.
l General functionality.
Semiconductor manufacturing requires an HMI with diverse capa- bilities, such as real-time indicators, pushbuttons and other unique switching functions. Industry stan- dards for semiconductor manufactur- ing equipment, such as SEMI, should also be considered.
l Degree of input complexity. Input l Operator feedback. Feedback is
can be as simple as an on/off switch or a touchscreen display, depending on the needs of the operator.
critical to operator effectiveness and efficiency, especially in systems that have no mechanical travel, such as a touchscreen or a capacitive device.
l Interconnection with other sys-
tems. For semiconductor applica- tions, HMI systems must be able to interface and interconnect with other related systems through and industry-specific bus.
l Environmental considerations. In
electronics production, environmen- tal considerations might include cleanroom safety, corrosive gas pro- tection and resistance to acids and other caustic agents. The HMI sys- tem should be rugged enough to withstand these elements and heavy use for the duration of the equip- ment’s lifecycle.
Defining the Operator Typically, there are three gener-
al categories of users, each one requiring its own unique HMI func- tionality. Operators are responsible for the operation of one, or often mul- tiple, semiconductor production mach ines. They desire an HMI that is intuitive and offers continuous and flawless processing of a predefined series of tasks and feedback about the machine’s status, enabling fast- acting planned or unplanned adjust- ments. Supervisors managing specific
tasks beyond the authorization level of an operator may need specific HMI devices with dedicated access control features, such as key-switches and the controlled management of (mechanical) keys. In advanced designs, RFID tags
and readers can also be considered a solution. Maintenance personnel may require full access to machine control
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and data displays that is often inaccessible by operators and supervisors.
Designing the HMI Panels should be laid out in a way that pro-
End user operation is a primary driver of design features and component selection.
vides the operator with functional groups of relat- ed information in a predictable and consistent manner. The system should offer clear prompts for required actions and demand the operator to initi- ate actions, providing timely feedback when they are registered. An efficient HMI should also have a
Continued on next page
See at productronica, Hall A5 Booth 181 and The ASSEMBLY Show, Booth 2006
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