Quality Control
Dear Valued Customer,
Thank you for your interest in our company! We are a company specializing in electronic product design and manufacturing, committed to providing our customers with high-quality, reliable products and services. We understand the importance of quality in electronic products, and therefore have established a comprehensive quality control system to ensure that our products meet your needs and expectations.
Our quality policy is: continuous improvement, customer satisfaction, pursuit of excellence.
We strictly adhere to ISO 9001 quality management system standards and integrate them into all aspects of our company's operations. Our quality control system includes the following key processes:
Design Phase: We conduct rigorous design reviews to ensure that the design meets customer requirements and relevant standards. We also use advanced CAD software for design simulation and analysis to ensure product reliability and manufacturability.
Material Procurement: We work with certified suppliers to ensure that the raw materials and components we procure meet quality standards. We also conduct regular assessments and audits of our suppliers to ensure the stability and reliability of our supply chain.
Production Process: During production, we strictly follow production processes and implement quality control measures such as online inspection and patrol inspection. We also use SPC (Statistical Process Control) and other statistical methods to monitor the stability of the production process, ensuring product consistency and reliability.
Product Inspection and Testing: We have a professional testing laboratory equipped with advanced testing equipment to conduct comprehensive inspections and tests on our products, ensuring that they meet quality standards and performance requirements.
After-Sales Service: We provide comprehensive after-sales service, promptly resolving any issues encountered by our customers, and collecting customer feedback to continuously improve our products and services.
To better manage quality data, we have established a comprehensive data management system to collect, analyze, and manage quality data, enabling us to identify issues promptly and make improvements. We have also established a product quality traceability system, allowing us to trace the entire production process of a product from raw materials to the final product, facilitating problem troubleshooting and handling.We are constantly improving our products and services by collecting opinions and suggestions from employees and customers through methods such as quality improvement teams, 6 Sigma projects, QCC,etc.
We always consider quality as the lifeline of our business and continuously improve our quality control system to provide our customers with high-quality products and services. We look forward to collaborating with you to create high-quality electronic products!
We hope this introduction provides you with a basic understanding of our company's quality control system.
Please feel free to contact us if you have any questions.
Thank you!
Production Process:
Supplier Evaluation：
BTS rigorously evaluates suppliers to ensure the procurement of compliant components and stable supply of regulated products. We select qualified suppliers based on their QCD performance, establish long-term relationships, consider financial stability, prioritize total quality performance, and foster collaboration. Our aim is to enhance the supply chain and meet the evolving demands of our customers.
Order Pre-Review：
After receiving a customer's purchase intention, BTS's Sales and Technical departments collaborate for a preliminary order pre-review. The sales representative compiles the necessary information, and if there are new products, it is shared with relevant departments for estimation. The completed pre-review form is submitted to the Technical and Planning departments for evaluation. Any objections are reported to the Sales Supervisor for coordination. The Engineering Department cross-checks the order details and updates the necessary documentation for new products or processes.
| Item |
Number |
Check Content |
| Design Files |
1 |
The customer should provide Gerber or ODB format files that can be opened and viewed correctly by the software. |
| 2 |
The provided files should not contain two or more different design files. If there are multiple files, confirmation should be sought from the customer regarding the correct file. |
| 3 |
Ensure that all required layer files are complete and accurate, including signal layer, solder mask layer, silkscreen layer, solder paste layer, drill layer, outline layer, etc. (Note: The solder paste layer can be ignored if the customer confirms its absence.) |
| BOM File |
4 |
Check if the reference designators, quantities, and part numbers (PN) are complete, without any omissions or disputes. |
| 5 |
Check for any wrong or duplicated reference designators in the BOM. |
| 6 |
Verify if each row's reference designator corresponds to the correct quantity and if there are any mismatches. (Note: BOM checking software can be utilized for self-checking of the BOM, as detailed in the "BOM Checking Software Operation Specification" document.) |
| Coordinate File |
7 |
The file should include columns for reference designator, X-coordinate, Y-coordinate, rotation angle, and mounting side. |
| 8 |
The file should contain coordinates for all SMT components listed in the BOM. (Note: If the customer confirms the unavailability of a coordinate file, manual point extraction from the design file or assembly drawing should be performed, ensuring clear and unambiguous reference designators for each component.) |
| 9 |
The X and Y coordinates in the file should be located at the center of the component or package, not in the center of a solder pad or any other location of the component. (Note: If the coordinate file does not meet this requirement and the customer cannot update it, refer to item 8.) |
| 10 |
The file format can be of any type that can be correctly opened and used, such as MNT/MNB, CSV, POS, TXT, Excel, HTML, etc. |
| Other Files (Non-essential) |
11 |
If the design files' silkscreen layer or other layers do not include reference designator markings or lack some reference designators, an assembly drawing should be provided to indicate the component positions. |
| 12 |
If certain components require special installation methods, special installation instructions should be provided. |
| 13 |
Some customers may provide dedicated documentation explaining component polarity. Pay special attention to such documents, and 3D images and schematics can also serve as references for component orientation. |
| Manufacturability |
14 |
Conduct a detailed review of the files provided by the customer, identify special process points, and formulate processing requirements to be communicated to the production line. |
Incoming material IQC inspection:
Incoming materials undergo strict inspection procedures to monitor and audit supplier or customer material quality. Precise inspection equipment ensures accurate assessment. 100% solder pad compatibility checks prevent process defects and delays. We follow industry-standard sampling criteria and internal inspection procedures.
IQC Inspection
| Responsible Personnel |
Input |
Process Description |
Output |
| Warehouse |
Shipment Order |
Warehouse fills out the Shipment Inspection Form based on the Shipment Order. |
Shipment Inspection Form |
Quality Department
Material inspector |
Drawing Inspection Guidebook |
Material inspector conducts inspection based on the Inspection Guidebook and drawings.
The supplier must provide a shipping report when receiving materials |
Inspection Report
Inspection Records
Product Specification Card |
Warehouse
Quality Department |
Product Specification Card |
Warehouse confirms if the product is suitable for storage or retrieval based on the Product Specification Card. |
Incoming Receipt |
| Procurement Department |
Special Procurement Request Form |
If the inspector finds the product to be non-conforming, and it is a non-urgent order, it can be returned. If it is an urgent order, a special procurement request is raised.
The Quality Department issues a quality information feedback form to the supplier. |
Defective Product Review Form
Return Form
Quality Information Feedback Form |
Production Department
Quality Department
Procurement Department Engineering Department |
Non-conformance Review Form |
Quality Department leads relevant personnel from different departments for product quality inspection.
Review conducted on appearance, functionality, dimensions, and process assembly. |
Receipt of Goods
Return Order |
Quality Department
Warehouse |
Shipment Order |
Products that require repair are sent for rework. After rework, they are re-inspected. If the inspection is successful, they can be stored; otherwise, they are returned to the supplier. |
Incoming Receipt
Return Order |
Production Process Control and Quality Insurance:
BTS maintains control over the production process through accurate instructions, equipment management, and strict WIP inspection. Advanced inspection equipment and a dedicated team led by FQA ensure products meet customer specifications. Sampling inspections and customer confirmation are obtained prior to packaging and shipping.
| Measure |
Description |
| High-end Equipment and Precision Processing |
The production line is equipped with high-end equipment for high precision and yield. |
| Quality Inspection and Control at Each Process |
Quality testing and control are conducted at each processing stage to prevent defective products from entering the next stage. |
| Multiple Quality Personnel for Full Inspection |
Multiple quality personnel are assigned to perform comprehensive inspections throughout the process. |
| Tape Covered PCB Pre-SMT |
Tests the SMT component placement and material correctness using tape covered PCB , significantly reducing SMT trial production time and ensuring SMT quality effectively. |
| Intelligent First Article Inspection Equipment |
Detects misplacement, missing components, orientation, silk screen accuracy, etc., mainly used for first article inspection. Offers higher accuracy and speeds up the process by 50%+ compared to manual inspection. |
| SPI - Fully Automated 3D Solder Paste Inspection |
Detects various solder paste printing quality issues, including misprints, insufficient or excess solder, bridging, misalignment, poor shape, board surface contamination, etc. |
| AOI - Fully Automated Optical Inspection Equipment |
Inspects various issues after component placement, such as short circuits, missing components, polarity, displacement, wrong components, etc. |
| X-RAY |
Performs open and short circuit testing for devices like BGA and QFN. |
SPI (Solder Paste Inspection) AOI(Auto Optical Inspection)
First-article Inspection Equipment In-line Visual Inspection Before Reflow Pre-Shipment Full Inspection for DIP
Packaging and Shipping:
To ensure products reach customers in good condition, various packaging methods are used based on product or customer requirements. Before shipping, FQA checks product details and verifies accuracy. Suitable packaging materials, such as ESD bags, anti-static pearl cotton foam, and bubble wraps, are used to accommodate different product sizes.
Packaging method 1 (anti-static pearl cotton + bubble wrap):
Packaging method 2 (anti-static pearl cotton + bubble wrap + ESD bag):
Packaging method 3 (ESD bag + knife card):
After-sales customer complaint handling process：
BTS has a professional customer service team that ensures timely response, feedback, and issue resolution. We actively handle customer feedback and support product repair. Regular surveys are conducted to address customer needs and adjust our services accordingly.
| Number |
Responsible Department |
Input |
Process Description |
Output |
| 1 |
Sales Department |
Customer Complaint |
Sales department receives customer complaint and promptly notifies the Complaint Handling Team via email. |
Complaint Email |
| 2 |
Quality Department |
Customer Feedback Email |
Quality department receives the email and immediately organizes relevant personnel to analyze the cause. |
Investigated and Analyzed Report |
| 3 |
Quality Department |
Investigation and Analysis |
Provide preliminary countermeasures within 24 hours. If no external assistance is required, respond with investigation results and improvement measures within 48 hours. |
8D Report |
| 4 |
Quality Department |
Rework Instruction |
Perform rework on defective products (refer to RMA Process Flowchart). |
BTS Rework Order
RMA Process Flowchart |
| 5 |
Quality Department |
Customer Complaint Information |
Quality department organizes and saves customer complaints. |
Customer Complaint Registration Form |
