FPD2250
Preferred Assembly Instructions
GaAs devices are fragile and should be handled with great care. Specially designed collets should be used where possible.
The back of the die is metallized and the recommended mounting method is by the use of conductive epoxy. Epoxy should be
applied to the attachment surface uniformly and sparingly to avoid encroachment of epoxy onto the top face of the die. Ideally
it should not exceed half the chip height. For automated dispense Ablestick LMISR4 is recommended and for manual dispense
Ablestick 84-1 LMI or 84-1 LMIT are recommended. These should be cured at a temperature of 150°C for one hour in an oven
especially set aside for epoxy curing only. If possible the curing oven should be flushed with dry nitrogen. The gold-tin (80% Au
20% Sn) eutectic die attach has a melting point of approximately 280°C but the absolute temperature being used depends on
the leadframe material used and the particular application. The maximum time at used should be kept to a minimum.
This part has gold (Au) bond pads requiring the use of gold (99.99% pure) bondwire. It is recommended that 25.4mm diameter
gold wire be used. Recommended lead bond technique is thermocompression wedge bonding with 0.001” (25µm) diameter
wire. Bond force, time stage temperature and ultrasonics are all critical parameters and the settings are dependent on the
setup being used and application. Ultrasonic or thermosonic bonding is not recommended.
Bonds should be made from the die first and then to the mounting substrate or package. The physical length of the bondwires
should be minimized especially when making RF or ground connections.
Handling Precautions
To avoid damage to the devices, care should be exercised during handling. Proper Electro-
static Discharge (ESD) precautions should be observed at all stages of storage, handling,
assembly, and testing. These devices should be treated as Class 0 (0V to 250V) using the
human body model as defined in JEDEC Standard No. 22-A114. Further information on ESD
control measures can be found in MIL-STD-1686 and MIL-HDBK-263. This is an unpackaged
part and therefore no MSL rating applies.
Application Notes and Design Data
Application Notes and design data including S-parameters and device model are available on request and from
www.rfmd.com.
Reliability
An MTTF of 4.2 million hours at a channel temperature of 150°C is achieved for the process used to manufacture this device.
Disclaimers
This product is not designed for use in any space-based or life-sustaining/supporting equipment.
Ordering Information
Delivery Quantity
Full Pack (100)
Ordering Code
FPD2250-000
Small Quantity (25)
Sample Quantity (3)
FPD2250-000SQ
FPD2250-000S3
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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RFMD [ RF MICRO DEVICES ]
