30+ Ebizon Net Info Interview Questions and Answers

To modify stencil, fixture, palets, support block and BGA rework stencil, one needs to follow specific steps.

• Stencil modification requires adjusting the aperture size and shape to improve paste deposition

• Fixture modification involves changing the clamping mechanism to ensure proper alignment

• Palet modification involves adjusting the tooling holes to fit the PCB

• Support block modification requires changing the height to accommodate components

• BGA rework stencil modification invol...read more

Multiple AOI defects can occur due to various reasons and can be resolved by identifying the root cause and taking corrective actions.

• AOI defects can include missing components, wrong polarity, tombstoning, bridging, etc.

• Root causes can be incorrect programming, machine calibration, component placement, solder paste printing, etc.

• Corrective actions can include reprogramming, recalibrating, adjusting placement parameters, improving solder paste printing, etc.

• Regular maintenanc...read more

Multiple SPI defects can occur due to various reasons, leading to poor quality and reliability of the product.

• SPI defects can be caused by issues with the solder paste, stencil design, or the reflow process.

• To resolve the issue, it is important to identify the root cause and take corrective actions.

• Improving the solder paste quality, optimizing the stencil design, and adjusting the reflow profile can help resolve the issue.

• Regular inspection and testing can also help prevent ...read more

UPH stands for Units Per Hour, Line of Balance is a scheduling technique, PPM stands for Parts Per Million in quality control.

• UPH (Units Per Hour) is a measure of productivity in manufacturing, indicating the number of units produced in an hour.

• Line of Balance is a scheduling technique used in project management to track progress and ensure resources are allocated efficiently.

• PPM (Parts Per Million) is a measure of quality control, indicating the number of defective parts per...read more

SMT (Surface Mount Technology) is a process used in electronics manufacturing to mount electronic components onto the surface of a printed circuit board (PCB).

• SMT involves placing electronic components onto the PCB using solder paste and a pick-and-place machine.

• The solder paste is applied to the PCB using a stencil, and then the components are placed onto the paste.

• The PCB is then heated in a reflow oven, causing the solder paste to melt and create a permanent connection bet...read more

An electronic mechanic is a professional who specializes in the installation, maintenance, and repair of electronic equipment.

• Electronic mechanics work with a variety of electronic devices, including semiconductors, carbon-based components, inductors, and transformers.

• They may be responsible for troubleshooting and diagnosing problems with electronic equipment, as well as repairing or replacing faulty components.

• Electronic mechanics may work in a variety of settings, includin...read more

Assembly line rejection can occur due to various reasons such as faulty equipment, human error, incorrect materials, and inadequate training.

• Faulty equipment can cause defects in the products being assembled

• Human error such as incorrect assembly or misplacement of parts can lead to rejection

• Incorrect materials or parts can cause defects or malfunctions in the final product

• Inadequate training of assembly line workers can lead to errors and defects

• Lack of quality control measur...read more

Aspect ratio is the ratio of the longer side of a rectangle to its shorter side, while area ratio is the ratio of the total area of a shape to the area of a reference shape.

• Aspect ratio is calculated by dividing the length of the longer side by the length of the shorter side.

• Area ratio is calculated by dividing the total area of a shape by the area of a reference shape.

• Aspect ratio formula: Aspect Ratio = Length of Longer Side / Length of Shorter Side

• Area ratio formula: Area ...read more

SMT mounting flow chart is a visual representation of the steps involved in surface mount technology component mounting process.

• SMT components are picked and placed on the PCB using automated equipment.

• Components are then soldered onto the PCB using reflow soldering or wave soldering techniques.

• Inspection and testing are done to ensure proper component placement and soldering.

• Final inspection and quality control checks are performed before the PCB is considered ready for use.

To handle low manpower and high UPH, prioritize tasks, cross-train employees, and implement automation.

• Prioritize tasks based on their importance and urgency

• Cross-train employees to perform multiple tasks

• Implement automation to reduce the workload on employees

• Use data analysis to identify bottlenecks and optimize processes

• Consider outsourcing or hiring temporary staff if necessary

Electronics components are individual parts that make up electronic circuits, such as resistors, capacitors, transistors, and diodes.

• Electronics components are basic units used in electronic circuits

• They can be passive components like resistors, capacitors, and inductors

• They can be active components like transistors, diodes, and integrated circuits

• Examples include resistors (e.g. 1k ohm), capacitors (e.g. 10uF), transistors (e.g. NPN), and diodes (e.g. LED)

A capacitor is an electronic component that stores and releases electrical energy.

• Capacitors are used to filter out noise in electronic circuits.

• They can store energy and release it quickly when needed.

• Capacitors are commonly used in power supplies, audio equipment, and electronic devices.

• Examples include ceramic capacitors, electrolytic capacitors, and tantalum capacitors.

SPI parameters are defined based on the specific requirements of the PCB and components being used.

• SPI parameters include clock frequency, data format, and signal voltage levels.

• The clock frequency should be set to the maximum frequency supported by the components.

• Data format can be set to either MSB or LSB depending on the component requirements.

• Signal voltage levels should be set to match the voltage levels of the components being used.

• SPI parameters can be adjusted using t...read more

Managing production line involves optimizing processes, ensuring quality control, and minimizing downtime.

• Develop and implement standard operating procedures

• Monitor production metrics and adjust processes as needed

• Train and supervise production staff

• Maintain equipment and perform regular maintenance checks

• Implement quality control measures

• Minimize downtime through efficient scheduling and preventative maintenance

SMT process stands for Surface Mount Technology process, which involves mounting electronic components directly onto the surface of a printed circuit board (PCB).

• Involves placing electronic components onto the surface of a PCB

• Utilizes solder paste to attach components to the board

• Involves reflow soldering to melt the solder and create a permanent bond

• Can include inspection and testing steps to ensure quality

• Common in mass production of electronic devices

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

• Transistors are fundamental building blocks of modern electronic devices.

• They can amplify signals, regulate currents, and act as switches.

• Common types of transistors include bipolar junction transistors (BJTs) and field-effect transistors (FETs).

npm Mounter is a tool used to mount npm packages as local directories for development purposes.

• npm Mounter allows developers to work on npm packages locally without publishing them to the npm registry.

• It helps in testing and debugging npm packages before final deployment.

• Developers can use npm Mounter to easily switch between different versions of npm packages during development.

• Example: npm-mounter mount my-package

SMT stands for Surface Mount Technology, a process of mounting electronic components onto the surface of a printed circuit board (PCB).

• SMT involves placing components onto the PCB using pick-and-place machines.

• The components are then soldered onto the PCB using a reflow oven.

• SMT allows for smaller and more compact electronic devices.

• SMT requires specialized equipment and trained personnel.

• SMT has largely replaced through-hole technology in modern electronics.

Line rejection can be managed by identifying the root cause, implementing corrective actions, and monitoring the process.

• Identify the root cause of rejection

• Implement corrective actions to address the root cause

• Monitor the process to ensure the corrective actions are effective

• Use statistical process control to identify trends and prevent future rejections

CPH stands for Cycles Per Hour, which is a measure of how many cycles a machine can complete in one hour.

• CPH is used to measure the productivity and efficiency of a machine.

• It is calculated by dividing the total number of cycles completed by the machine in one hour by the total operating time in hours.

• For example, if a machine completes 500 cycles in one hour, its CPH would be 500.

• CPH can vary depending on the type of machine and its design.

Diodes are electronic components that allow current to flow in one direction only. There are several types of diodes.

• Rectifier diodes

• Zener diodes

• Schottky diodes

• LEDs

• Varactor diodes

• Tunnel diodes

A diode is an electronic component that allows current to flow in only one direction.

• Diodes have two terminals: an anode and a cathode.

• When a voltage is applied to the anode, current flows through the diode.

• However, if the voltage is applied to the cathode, no current flows.

• Diodes are commonly used in rectifiers, voltage regulators, and signal limiters.

Mechanical engineering is a branch of engineering that deals with the design, analysis, and manufacturing of mechanical systems.

• It involves the application of principles of physics, material science, and mathematics to create machines and devices.

• Mechanical engineers design and develop everything from small individual parts to large systems and machines.

• Examples of mechanical systems include engines, turbines, robots, and manufacturing equipment.

• Mechanical engineers also work...read more

A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.

• Rectifiers are used in power supplies to convert AC voltage to DC voltage.

• There are two types of rectifiers: half-wave and full-wave.

• A half-wave rectifier only allows half of the AC waveform to pass through, while a full-wave rectifier allows the entire waveform to pass through.

• Rectifiers are commonly used...read more

Capacitor value is the measure of a capacitor's ability to store an electric charge.

• Capacitor value is measured in Farads (F)

• Capacitor value determines the amount of charge a capacitor can store

• Capacitor value can be calculated using the formula C = Q/V, where C is capacitance, Q is charge, and V is voltage

• Capacitor value can be affected by factors such as temperature, humidity, and frequency

Manufacturing process is the process of converting raw materials into finished products through a series of steps.

• It involves designing, planning, and executing the production of goods.

• It includes various stages such as material handling, machining, assembly, and quality control.

• Examples include car manufacturing, food processing, and electronics production.

Sensors are devices that detect and respond to physical input from the environment.

• Types of sensors include temperature sensors, pressure sensors, proximity sensors, motion sensors, and light sensors.

• Some examples of sensors are thermocouples, accelerometers, ultrasonic sensors, and photodiodes.

To achieve production plan, it is important to set clear goals, optimize processes, monitor progress, and make adjustments as needed.

• Set clear production goals based on market demand and available resources

• Optimize production processes to improve efficiency and reduce waste

• Monitor progress regularly using key performance indicators (KPIs)

• Make adjustments to production plan as needed based on real-time data and feedback

• Collaborate with cross-functional teams to ensure alignmen...read more

ASM machine stands for Automated Surface Mounting machine, used in electronics manufacturing for placing surface mount components onto printed circuit boards.

• ASM machines are used in electronics manufacturing for high-speed and accurate placement of surface mount components onto PCBs.

• They use vision systems and robotic arms to pick and place components onto the board.

• ASM machines are essential for mass production of electronic devices such as smartphones, laptops, and tablets...read more

Maintenance is the process of ensuring that equipment, machinery, or systems are kept in good working condition through regular inspections, repairs, and replacements.

• Regularly inspecting equipment to identify any issues or potential problems

• Performing routine maintenance tasks such as lubrication, cleaning, and adjustments

• Repairing or replacing faulty components to prevent breakdowns and ensure optimal performance

• Keeping detailed records of maintenance activities and schedul...read more