STMicroelectronics AN1235 Flip Chip Package Application Note

This document provides package and usage recommendation information for 500 µm pitch Flip Chips.


STMicroelectronics AN1235 Flip Chip Package Application Note - cover page
Brand
STMicroelectronics
Category
Other Electronics
Document type
Application Note
Language
English
Pages
14
File format
PDF
File size
273 KB
Published
06 August, 2012
Updated
30 September, 2023
MD5 checksum
CA665D2C730CDCF69BC3B6F102379C2C

About this manual

This document provides package and usage recommendation information for 500 um pitch Flip Chips. It covers mechanical descriptions, packing specifications, labelling, storage, shipping, and soldering assembly recommendations. The Flip Chip package family is designed to meet the same quality and reliability levels as standard semiconductor plastic packages without requiring special process steps like under fill.

The document details the lead-free bump composition (98.25% Sn, 1.2% Ag, 0.5% Cu, 0.05% Ni) and compatibility with standard lead-free reflow processes. It specifies that devices are delivered in tape and reel packing compatible with existing pick and place equipment. Mechanical dimensions and marking examples are provided, along with specifications for carrier tapes, cover tapes, and seven-inch reels compliant with EIA and IEC standards.

What's inside

  • Introduction
  • Product description
  • Mechanical description
  • Packing specifications
  • Labelling description
  • Recommended storage and shipping
  • Soldering assembly recommendations
  • User responsibility and returns
  • Delivery quantity
  • Quality

Specifications

Pitch500 um
Bump composition98.25% Sn, 1.2% Ag, 0.5% Cu, 0.05% Ni
Bump diameter310 um
Melting point218 to 227 °C
Package height (uncoated)0.65 mm
Package height (coated)0.695 mm
Coplanaritybelow 80 um
Dice quantity per reel5000
Reel typeSeven-inch

Frequently asked questions

What is the bump composition for these Flip Chips?

The lead-free bump composition is 98.25% Sn, 1.2% Ag, 0.5% Cu, and 0.05% Ni.

Do these Flip Chips require under fill?

No, this package does not require any extra under fill to increase reliability performances or to protect the device.

Are these Flip Chips compatible with standard lead-free reflow processes?

Yes, the bump composition is fully compatible with standard lead-free reflow processes.

What is the melting point of the bumps?

The bumps have a near eutectic melting point of 218 to 227 °C.

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