MB91F528 datasheet(53/241 Pages) SPANSION

53 / 241 page

D a t a S h e e t

MB91F528_DS705-00016-1v0-E, March 28, 2014

CONFIDENTIAL

 Lead-Free Packaging

CAUTION: When ball grid array (BGA) packages with Sn-Ag-Cu balls are mounted using Sn-Pb eutectic

soldering, junction strength may be reduced under some conditions of use.

 Storage of Semiconductor Devices

Because plastic chip packages are formed from plastic resins, exposure to natural environmental conditions

will cause absorption of moisture. During mounting, the application of heat to a package that has absorbed

moisture can cause surfaces to peel, reducing moisture resistance and causing packages to crack. To prevent,

do the following:

(1) Avoid exposure to rapid temperature changes, which cause moisture to condense inside the product.

Store products in locations where temperature changes are slight.

(2) Use dry boxes for product storage. Products should be stored below 70% relative humidity, and at

temperatures between 5°C and 30°C.

When you open Dry Package that recommends humidity 40% to 70% relative humidity.

(3) When necessary, Spansion packages semiconductor devices in highly moisture-resistant aluminum

laminate bags, with a silica gel desiccant. Devices should be sealed in their aluminum laminate bags

for storage.

(4) Avoid storing packages where they are exposed to corrosive gases or high levels of dust.

 Baking

Packages that have absorbed moisture may be de-moisturized by baking (heat drying). Follow the Spansion

recommended conditions for baking.

Condition: 125°C/24 h

 Static Electricity

Because semiconductor devices are particularly susceptible to damage by static electricity, you must take

the following precautions:

(1) Maintain relative humidity in the working environment between 40% and 70%. Use of an apparatus

for ion generation may be needed to remove electricity.

(2) Electrically ground all conveyors, solder vessels, soldering irons and peripheral equipment.

(3) Eliminate static body electricity by the use of rings or bracelets connected to ground through high

resistance (on the level of 1 MΩ).

Wearing of conductive clothing and shoes, use of conductive floor mats and other measures to

minimize shock loads is recommended.

(4) Ground all fixtures and instruments, or protect with anti-static measures.

(5) Avoid the use of styrofoam or other highly static-prone materials for storage of completed board

assemblies.

MB91F528 데이터시트(PDF) 53 Page - SPANSION