Customer

Sales

• Product order
• DATA receipt

Specifications

• Specification review
• Simulation in the works
• CAM in the works

Process

• PCB production in the works

Quality

• Impedance measurement/analysis

Technology Department

• Problem identification /resolution

1. Optimal conditions are applied after reviewing specifications

• Data receipt and carrying out impedance simulations.
• Records need to be kept after designating impedance circuit width and carrying out correction during CAM work.
• After reviewing raw materials and stack-up, their commitment is carried out with optimal conditions fit for impedance
• Impedance-related products are clearly specified on the work order with daily logs attached for work records.

2. Plating thickness

• Plating thickness is managed by measuring it based on the work order standard.

3. D/F , E/T

• Film impedance points are measured and recorded.
• Records on the parts that went through E/T are kept by measuring circuit width after E/T and analyzing it on film. (influence on patterns during E/T)
• After checking impedance readings by using impedance measuring equipment, if there is any abnormality, it should be notified to the CAM/ Quality Team and then, the work should be resumed after readjusting circuit width.

4. Impedance measurement and management

• Coupon measurement for each range using measuring equipment is carried out.
• After lot-based Coupon and X-Section implementation inside real products, feedback is given as specifications on data regarding circuit width, copper and insulation layer thickness.
• NG Lot should be considered defective during measurement and handled based on the process disorder lot-processing standard.

5. Specifications/Technology

• Products and measurements after production should be managed by holding contests or review meetings and identifying problems to find solutions and provide feedback.
• Data measured by the analysis center / Optimal maintenance of impedance simulation values and real measurements should be enabled by building databases for process data.
• Entire model management should enabled after computerized/ERP registration.

Main management items of the concerned guidelines

No	Management items	Management standards	Measurement methods	Cycles	Persons in charge	Management methods	Contingency plans	Remark
1	Impedance	ERP	Impedance measuring instrument	LOT	Analysis center	Measuring instrument