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Exposed Pad LQFP
Exposed Pad Low Profile Quad Flat Pack
High performance applications which require improved power dissipation benefit from the use of an exposed pad, die pad heat sink or exposed drop-in heat sink in LQFP, respectively. Electrical performance is also improved with exposed pad as a ground plane.
Thermal performance is improved up to 25% when the die pad is soldered on PCB compared with conventional LQFPs and is suitable for 2 - 2.5 watts power application. Electrical performance is improved with exposed pad acts as a ground plane. The body size ranges from 7x7 mm to 28x28 mm and pin counts from 32 to 256 are ready for your choice.
APPLICATIONS
Exposed Pad LQFP are ideal for a wide range of devices, such as microprocessors, controllers, DSPs, high speed logic, FPGAs, PLDs, and ASICs. Applications include laptops, telecom, high end audio/video and CPU/GUI boards.
FEATURES
E-PAD LQFP
• Exposed Pad Heat Sink
• 7X7 and 28x28 mm body sizes
• 32 to 256 lead counts available
• Stack die design / Multiple chip module design
• Copper lead frames
• Full in-house design ability
• JEDEC standard outlines
E-PAD LQFP
Process Flow Material
Normal Lead Free/Green
Wafer Back Grinding (Option)
Wafer Mount
Wafer Saw & Clean
2nd Optical Inspection
Die Attach
Epoxy Cure
Plasma Clean
Wire Bond Gold Wire,Copper Wire
3rd Optical Inspection
Molding
Marking White ink or Laser
Post Mold Cure
Deflash (Option) laser deflash or chemical deflash
Deflash & Trim
Solder Plating Sn/Pb 85/15 Matte Tin, Sn/Bi 98/2
Forming & Singulation
Final Visual Inspection
Packing Tray
 
 
RELIABILITY
• Moisture Sensitivity JEDEC Level 3 (30°C / 60% RH / 192 hours)
• Temp. Cycle Test -65/+150°C, 1000 cycles
• Pressure Cooker 121°C, 100% RH, 2 atm, 168 hours
• High Temperature Storage Life 150°C ,1000 hours
 
Note: Sample preconditioning prior to environmental tests are as follows:
(Normal) Baking 125°C, 24 hours ◊ Pre-con: 30°C / 60% RH / 192 hours ◊ IR Reflow 3 times:240°C (Body Volume<350mm3), 225°C (Body Volume>350mm3)
(Lead Free) Baking 125°C, 24 hours ◊ Pre-con: 30°C / 60% RH / 192 hours ◊ IR Reflow 3 times, 260°C
 
 
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