Die Attach & Assembly Process Engineer

Project

Work done for a product or program.

• Develop and optimise die attach processes for epoxy paste, die attach film and sintered silver, controlling bond line thickness, voiding and fillet.
• Set up and qualify die bonders from ASMPT, Besi, Kulicke & Soffa and Shinkawa for placement accuracy, tilt and throughput.
• Define wafer mount, laser or blade dicing and pick-up processes that protect ultra-thin dies from chipping and cracking.
• Control die attach cure profiles and oven ramps to manage adhesion, outgassing and warpage of the mounted assembly.
• Establish SPC for placement accuracy, rotation, bond line thickness, void percentage and shear strength with defined out-of-control action plans.
• Drive first-pass yield improvement by root-causing die crack, tilt, voiding, delamination and pick-up failures.
• Qualify multi-die and stacked-die placement including spacer dies, film-over-wire and pyramid stacks for memory products.
• Own equipment preventive maintenance specifications, tooling wear limits and bond head calibration schedules with production maintenance.
• Lead process qualification for new products, running capability studies and producing PFMEA and control plan updates.
• Reduce cost per unit through cycle-time reduction, material usage optimisation and multi-head or gang bonding conversion.

Function

Work that keeps the discipline running: methods, tools, suppliers and people.

• Maintain process specifications, control plans and work instructions.General
• Work with equipment and material suppliers on performance and quality.General
• Improve cost, cycle time and yield across the operation.General

Project

1. Produce and hand over the role's key deliverables
   • Die attach process specification and recipe library
   • Bonder qualification and machine capability study
   • SPC control plan with reaction rules
   • PFMEA and process control plan for die attach
   • Yield improvement project reports
   • Equipment maintenance and calibration specification
2. Introduce new productsGeneral
   • Set up and qualify the process
   • Transfer it to production
   • Support the ramp
3. Keep production in controlGeneral
   • Monitor statistical process control charts
   • Contain excursions
   • Close corrective actions

Function

1. Maintain the process baselineGeneral
   • Keep specifications and control plans current
   • Manage changes through change control
2. Improve the operationGeneral
   • Reduce cost and cycle time
   • Work with suppliers on quality