MRSI-175Ag EPOXY DISPENSER

The MRSI-175Ag handles large boards, fixtures, or boats. The system operates as a stand-alone dispensing station, or when in inline conveyor mode, as an upstream or downstream dispenser linked with other manufacturing equipment.

Tri-color (red, green, and blue) stadium lighting is combined with a collimated light source that incorporates programmable lighting intensity to enable the processing of the widest range of die, substrates and packages. Global and local vision alignments are used for nested substrates and features. This enables and fast error free processing of complex assemblies.

The MRSI-175Ag is the only dispenser with a substrate surface mapping ability through laser height sensing. The system uses a laser to sense height in three locations, thereby determining the tilt of the surface on which material will be dispensed. An unlimited number of surfaces are mapped within a package. Surface mapping enables precise gap control during dispensing. This is especially valuable when dispensing on substrates that were manually mounted in a previous process.

In cases where laser triangulation is limited, MRSI systems offer the option of using a Confocal Height Sensor to establish the dispense height in a single axis. The unique approach provides the capability to dispense adhesives into deep cavities and channels, such as those commonly found in RF microwave packages.

The MRSI-175Ag features high-resolution servo driven, positive displacement pumps, for the most accurate dispensing of dots, lines and areas. A time/pressure or jet pump can also be integrated into the system, depending on the application, materials and process requirements.

Automatic needle calibration enables fast changeover between applications.

Automatic needle cleaning eliminates material build-up on the tip. Needle cleaning steps are automatically turned on during the dispense program to enable smooth transitions between area fills and small dots.

Automatic needle priming assures precise dispensing.

Choose from a broad range of application specific needles including tapered needles, polished needles and “footed” needles.

The MRSI-175Ag’s intuitive graphical user interface, running on Windows™ simplifies the set-up and production process. The software includes a pre-programmed library of dots, lines, area fills, spirals, arcs, and star patterns. An easy to use tool makes these patterns easily customized to fit the application. Once taught, dispense programs are quickly optimized. Calibration routines, offline programming, and CAD download mean little time is spent programming and more time is available for production. Dispense programs generated on the MRSI-175Ag can be used to create placement programs on the MRSI Die Bonders.

The MRSI-175Ag is the perfect companion to other MRSI Systems assembly equipment since it shares the same software platform and is SMEMA compatible. It can also be combined with other manufacturers’ SMEMA compatible units for a complete production line.

Tooling is modular, ensuring fast, easy change-over between production runs – In addition to standalone mode, the MRSI-175Ag supports two modes of operation when it comes to product presentation. They are cassette-to-cassette and inline conveyor modes.

Cassette to Cassette: The product to be processed is stacked in cassettes. The cassette(s) contains multiple boats or common carriers, which hold the individual substrate(s). The input loader indexes the cassette(s) up and down and pushes the boat or common carrier from the cassette onto the material handling conveyor. Customers can supply their own cassettes or magazines or it can form part of this options package. The material handling conveyor transfers the boat or common carrier holding the substrates to the work area. The assembly station (i.e. fixturing, personality plate) lifts to hold the parts for processing (e.g. dispensing, assembly, etc.). After the process is completed, the conveyor transfers the boat or common carrier to the output cassette. Customers can supply their own boats or these can be included in the quote.

Inline – Setup the MRSI-175Ag dispenser to operate upstream or downstream from other machines, such as one of the MRSI placement systems. The adjustable width, in-line conveyor transports boats, common carriers, or lead frames. Tooling is modular for easy change-over between production runs.

Benefits:

• Easily integrated into automated production lines, both the in-line and cassette-to-cassette tooling options allow for greater machine autonomy, translating into a workload reduction and less setup downtime.
• Existing customer tooling, used upstream and or downstream from the dispenser, can be adapted; allowing streamlined product handling strategies to be implemented. Less product transfer means less operations, lower handling defect rates and improved cycle time

With this option, hardware for epoxy stamping is mounted in substitution of the second dispense head. Stamping of epoxy dots as small as 0.004” (100 microns) is achieved. Sequentially, the stamping tool is dipped into a rotating well to pick up epoxy (1) based on surface tension; the head then moves to location (2) and the material is then released to the substrate, again through surface tension (3).

Two different epoxy materials may be transferred simultaneously, using separate well reservoirs.

Different dot dimensions are obtained by adjusting the height of a wiper blade, which controls the amount of material in the epoxy well, and therefore the amount of material transferred onto the stamping tool. The stamping package option includes the stamping head itself, stamping tools and the epoxy well(s). Custom stamping tools are also quotable.

Benefits:

• Choose the process that fits the application. Stamping for small dots or Dispensing. You will be ready for anything that comes your way!
• Control the costs by controlling the process. High yields mean reduced costs.
• Get better use of your existing productions lines by adding a dispensing tool with stamping options. Increase the line throughput by doing so.

Dispense pumps and needles are heated via a closed loop thermal controller. Independent temperature settings can be set for the pump body and the needle.

Benefits:

• Ability to dispense materials at temperature. Choose optimum temperature for a given material.
• Better process control by separate settings for pump and needle.

The MRSI-175Ag is available with dual real time video. The system automatically switches between dispense tips to focus on the tip currently being used. This tool enables constant process monitoring.

Benefits:

• Real Time Process Monitoring. You can always verify that the process is under control.
• Less rework due to incomplete processing.

A confocal chromatic sensor is used to precisely determine dispense heights. The confocal sensor allows measurements in a single axis providing access to deep cavities and in close proximity to walls and other obstructions. The sensor can accurately map areas not accessible to a laser triangulation system.

An LED light source with a sensor spot size of 50 microns in diameter is utilized to provide nanoresolution that is target independent. The confocal sensor allows accurate measurement of glass, semiconductor materials and mirrored surfaces.

The sensor has a measurement range of 10 mm with a resolution of 0.4 microns at 0.004% Full Scale Output. All data is at a constant ambient temperature against an optical flat at 2kzHz, and specifications can change when measuring different materials.

Benefits:

• Handle applications that are normally out-of-reach
• Better yields through advanced sensor technology.

Hardware for a time/pressure dispense head is provided with the system.  This includes the flexibility to add  a second time/pressure dispense head for  dispensing  two epoxies  (e.g., conductive and non-conductive). The option includes the mounting hardware for  Time Pressure Dispensing  head(s).

Benefits:

• Adaptable to a range of dispensing approaches.
• Lower costs of dispensing equipment and lower maintenance costs.

Hardware for a jet pump dispense pump is mounted on the head. This option includes the mounting hardware and a second head with a jet pump with encoder feedback.

Benefits:

• Adaptable to a range of dispensing approaches.
• Achieve high throughputs typically associated with jetting.