Bonding tool and camera focus are driven along vertical ways by stepper motors through linear actuator and bell crank mechanisms that prevent damage from motor over travel for any reason. The work station moves on opposed ball bearings along horizontal ways driven by stepper motors through lead screws. An extra transfer way allows both drive motors to remain stationary to minimize moving inertia. Two additional motor and actuators couple through bearings to the bond head to drive the wire clamp position and the force spring preset. All motors are driven in micro-step mode, but with sufficient resolution to stop on half-step boundaries.

Computer CPU is Pentium II with 64 MB memory housed in an industrial card cage with PCI backplane and with 6.4 GB IDE hard disk storage. User data can be written in compressed format to and from Iomega 100 MB Zip disks. Programmed motions are calculated to accelerate acceleration, called "S Curve", and are executed through Galil Model DMC-1070-NA seven axis motion control. Motor phases are switched through IMS Models IM-1007 and IM-483 microstepping drivers. Matrox video frame grabber working together with Cognex Model 5200 pattern recognition system formats visual data. Monitor is Samsung TFT 15 in. flat panel color display, or equivalent. The vertical TV camera focus elevations are programmable. An external view TV camera to provide a side view of the bonding operation is also included. The view shown on the monitor is switched automatically between the alignment and the bonding views at appropriate times during the machine cycle.

The ultrasonic transducer is K~Sine Model 24-W, one half wave in length, operating at a nominal frequency of 63 KHZ. Built in ultrasonic power supply is K~Sine Part No 6795, four Watts. Settings of power and time program values are executed via an eight-bit interface. Radiant tool heat with panel mounted, constant current control is included.

Operator interface for data entry and edit and for all machine operation is a West·Bond software application running under Windows. Information is presented graphically via numerous forms designed specifically for each task. Operation is consistent with other applications running under Windows. A view of the work piece is presented in a window within the application window: Control of machine motions to measure coordinates and corrections is by standard Microsoft Mouse. Control of bonding execution is either by Mouse selection of form controls on screen, or optionally by a few dedicated switches. A complete context sensitive, hyper-text Help file is available at every event.

User data is organized in a Microsoft Access Database that is a part of the West·Bond application. This data is presented for view on forms specific to each task of entering, editing, and bonding, and optionally in its native tables where it can be manipulated by database methods. This data is stored, even for machine use, as an Access file with ".mdb" extension. These files include all data necessary to each customer device; including the pattern recognition binary data of the view of each chip align point and any bond targets. Several of these files can be stored on the hard drive and selected for use as desired. They can also be written for backup to Zip disks: Compression is automatic, both writing and reading. If customers have Microsoft Access available, they can view and print their data, hopefully without making illegal changes.

The design of the database and the application implements several concepts which make this machine especially useful for bonding high frequency, high power devices; such as, the definition of wires by "types" and the enforcement of "parallel" types. When not needed for other devices, these features can be ignored. In addition, there are included the repetition of blocks of coordinates as "copies", and optional provision to align individual bonds by pattern recognition for targeting very critical bonds after rotation more exactly than just correcting their chip align points.

Protection against Electrostatic Discharge is implemented by finishing exposed tool assemblies and other moving parts by Electro less Nickel plating, which is conductive; and all exposed painted parts with a powder-coated paint that is dissipative.

• None. Old Feature –73B,Light Tower, Assembly No. 8023, is now standard.

A Navitar Model No. 150 fiber optic ring illuminator, together with a beam splitter illuminator are provided for the vertical TV camera, and each is controlled for the needs of pattern recognition. K~Sine Automatic Wire Despooler is included. Bonding tools are not included. The microscope recommended for this model, but not included, is Olympus Stereo Zoom Model SZ3060E, ESD protected.

Electrical service required is 115 VAC, 50-60 Hz, 7 Amps. For 200-240 VAC, an external step-down transformer is required and must be secured by end-user. Air pressure at 50 psig and shop vacuum are required to operate the machine. Machine size is 28" deep x 38" wide x 48" high, exclusive of microscope. Weight is 545 lb. uncrated, or 645 lb. crated.