Surface-Mount (SMD) Soldering Course

Lesson 1 • History and Evolution of SMD

Traces the shift from through-hole to surface-mount technology and the industry drivers behind miniaturisation. Provides context for why SMD skills are essential in modern electronics manufacturing.

Lesson 2 • PCB Anatomy for SMD Assembly

Explains PCB layers, copper pads, solder mask, and silkscreen as they relate to SMD placement and soldering. Grounds students in board structure before any hands-on work.

Lesson 3 • SMD Component Families and Packages

Covers passive, active, and electromechanical SMD component types along with their standard package designations. Connects package knowledge to correct pad design and soldering approach.

Lesson 1 • Optical and Inspection Equipment

Introduces magnification tools, digital microscopes, and inspection lighting used to verify SMD joints. Establishes inspection habits that will be applied throughout all subsequent chapters.

Lesson 2 • Soldering Irons and Hot-Air Stations

Covers temperature-controlled irons, hot-air rework stations, and their respective tip and nozzle types. Connects tool selection to component package requirements introduced in Chapter 1.

Lesson 3 • Workspace Ergonomics and ESD Safety

Covers anti-static precautions, workstation layout, ventilation, and personal protective equipment. Safe workspace habits established here apply to every hands-on session in the course.

Lesson 4 • Component Storage and Handling

Addresses moisture-sensitive device ratings, tape-and-reel handling, and proper storage conditions. Prevents component damage before soldering begins.

Lesson 1 • Manual Stencil Printing Process

Walks through board fixturing, paste loading, squeegee angle, and stencil separation for hand printing. Consistent technique here directly determines reflow joint quality.

Lesson 2 • Paste Inspection and Common Defects

Identifies bridging, insufficient deposits, smearing, and misalignment in paste prints and their root causes. Defect recognition at this stage prevents downstream soldering failures.

Lesson 3 • Manual Paste Application with a Syringe

Teaches controlled syringe dispensing for prototyping and rework scenarios where stencils are impractical. Builds fine motor control and deposit consistency skills.

Lesson 4 • Stencil Design and Selection

Covers stencil materials, aperture design rules, and thickness selection relative to component pitch. Correct stencil design is the foundation of repeatable paste printing.

Lesson 1 • Placing Passive Components

Teaches placement technique for 0402 through 1206 resistors, capacitors, and inductors on solder paste. Builds the fine motor control required for smaller packages.

Lesson 2 • Component Orientation and Polarity

Covers reading silkscreen markings, datasheet pin-1 indicators, and polarity bands to orient components correctly. Misorientation is one of the most common and costly placement errors.

Lesson 3 • Placement Quality Checks

Establishes a pre-reflow inspection routine to catch misalignment, tombstoning risk, and missing components. Catching errors before reflow saves rework time and board material.

Lesson 4 • Placing ICs and Fine-Pitch Devices

Addresses alignment strategies for SOIC, QFP, and other multi-lead packages where lead pitch demands precision. Builds on passive placement skills with stricter tolerance requirements.

Lesson 1 • Common Reflow Defects and Root Causes

Analyses tombstoning, bridging, solder balling, and voiding with their process-parameter root causes. Systematic defect analysis enables corrective action without trial-and-error.

Lesson 2 • Hot-Air Reflow for Prototypes

Covers hand-held hot-air reflow technique for small boards and prototype quantities. Builds practical skill before introducing oven-based reflow.

Lesson 3 • Reflow Oven Operation

Introduces conveyor and batch reflow ovens, zone configuration, and profile programming. Oven reflow is the production-standard method students will encounter in professional settings.

Lesson 4 • Inspecting Reflow Solder Joints

Defines acceptable and defective joint criteria including wetting angle, fillet shape, and surface appearance. Inspection skills developed here are applied in every subsequent chapter.

Lesson 1 • Soldering SOIC and SOP Packages

Covers drag soldering and individual-pin techniques for gull-wing leaded ICs. Builds on passive soldering skills with the added challenge of multi-lead alignment.

Lesson 2 • Soldering Passive SMD Components

Teaches the tack-and-flow technique for two-terminal passives from 1206 down to 0402 packages. Establishes the fundamental iron control skills used in all subsequent hand soldering.

Lesson 3 • Iron Tip Preparation and Maintenance

Covers tinning, cleaning, and reshaping iron tips to maintain optimal heat transfer for SMD work. Tip condition directly affects joint quality and is the first step before any soldering session.

Lesson 4 • Soldering QFN and Bottom-Terminated Packages

Explains hot-air and iron techniques for QFN, DFN, and other bottom-terminated components with exposed pads. These packages require a different approach than leaded ICs.

Lesson 1 • Pad and Trace Repair After Rework

Covers lifted pad repair, broken trace jumpers, and via restoration techniques used after aggressive rework. Restores board functionality when mechanical damage has occurred.

Lesson 2 • Removing Passive and Small SMD Parts

Covers iron-based and hot-air removal of resistors, capacitors, and small SOT packages. Builds controlled removal habits before tackling larger, more complex components.

Lesson 3 • BGA Reballing and Replacement

Introduces BGA removal, pad cleaning, reballing, and replacement as an advanced rework skill. BGA rework requires the highest level of thermal control and alignment precision.

Lesson 4 • Rework Principles and Risk Management

Establishes when rework is justified versus board replacement and how to minimise thermal and mechanical risk. Sound judgment here prevents compounding damage during repair.

Lesson 1 • IPC Workmanship Standards Overview

Introduces the three IPC acceptability classes and their joint criteria for SMD assemblies. Provides the quality framework referenced in all inspection activities throughout the course.

Lesson 2 • Visual and Optical Inspection Methods

Covers unaided eye, stereo microscope, and automated optical inspection (AOI) principles for SMD boards. Systematic visual inspection is the primary quality gate in most assembly environments.

Lesson 3 • Statistical Process Control Basics

Applies control charts and defect rate tracking to SMD soldering processes to detect and prevent quality drift. Process control thinking elevates students from reactive to proactive quality management.

Lesson 4 • Cleanliness and Contamination Testing

Covers flux residue assessment, ionic contamination testing, and cleaning process validation for SMD boards. Contamination is a leading cause of field failures in assembled electronics.