IEC 60191-6-22:2012

Overview

IEC 60191-6-22:2012, titled Mechanical standardization of semiconductor devices - Part 6-22: General rules for the preparation of outline drawings of surface mounted semiconductor device packages - Design guide for semiconductor packages Silicon Fine-pitch Ball Grid Array and Silicon Fine-pitch Land Grid Array (S-FBGA and S-FLGA), is an international standard published by the International Electrotechnical Commission (IEC). This standard provides detailed mechanical specifications, outline drawings, and dimensional guidelines specifically for silicon-based surface-mounted semiconductor device packages, focusing on fine-pitch Ball Grid Array (S-FBGA) and Land Grid Array (S-FLGA) packages.

By establishing common dimensional references, codified nominal dimensions, terminal positioning, and mechanical symbols, IEC 60191-6-22:2012 promotes uniformity and interchangeability in semiconductor packaging design. This standard is crucial for engineers and designers working in semiconductor manufacturing, packaging development, and quality control.

Key Topics

• Scope and Purpose
  Defines the outline drawings and mechanical dimensions that apply to silicon-based fine-pitch BGA and LGA semiconductor packages, ensuring coherent package structure and material specifications.

• Terminal Position Numbering
  Introduces an alphanumeric grid system for terminal location identification, excluding specific letters (I, O, Q, S, X, Z) to avoid confusion. Rows are labeled alphabetically from bottom to top starting with A, while columns are numbered left to right starting at 1.

• Package Nominal Dimensions Code
  Provides a coding system combining package width (E) and length (D) shown to the second decimal place in millimeters for precise designation of package size.

• Symbols and Drawings
  Includes standardized graphical representations of S-FBGA and S-FLGA outlines, mechanical gauge drawings, and terminal-existence arrays. These visuals facilitate consistent design interpretation and communication across industry stakeholders.

• Dimensional Groups and Tolerances
  Defines two main groups of dimensions with detailed tables listing recommended nominal values and corresponding tolerances. Important parameters like package length, width, profile height (including warpage and tilt allowances), terminal pitch, ball diameters, and stand-off heights are meticulously specified.

• Design Constraints
  Sets maximum profile heights (e.g., not exceeding 1.0 mm) and tight tolerances on terminal ball heights to maintain package reliability and compatibility.

Applications

IEC 60191-6-22:2012 serves as a foundational document guiding the mechanical design of silicon fine-pitch BGA and LGA semiconductor packages widely used across multiple sectors, including:

• Semiconductor Manufacturing
  Ensures proper packaging dimensions and terminal arrangements that support automated assembly processes and high-density interconnects.

• Electronic Device Design
  Assists hardware designers in selecting or creating compatible surface-mounted packages for silicon-based chips tailored to performance, space, and thermal requirements.

• Quality Assurance and Testing
  Provides benchmarks for physical inspections, mechanical testing, and conformance verification to maintain product reliability and industry compliance.

• Supply Chain and Procurement
  Standardizes package outlines facilitating sourcing, interchangeability, and lifetime support with component vendors and assemblers.

Related Standards

IEC 60191-6-22:2012 forms part of the IEC 60191 series on mechanical standardization of semiconductor devices. Related parts of this series address:

• General mechanical requirements for semiconductor packages
• Other package outline drawings covering different package types beyond S-FBGA and S-FLGA
• Test methods and performance criteria for mechanical integrity

Industry professionals often consult these complementary documents along with IEC 60191-6-22 to ensure full compliance and mechanical compatibility within the semiconductor packaging ecosystem.

Keywords: IEC 60191-6-22, semiconductor package standard, fine-pitch ball grid array, silicon ball grid array, land grid array, S-FBGA, S-FLGA, surface mount device, semiconductor mechanical standardization, package outline drawings, terminal position numbering, semiconductor packaging design guide