Amaoe Stencil-Original BS2
The Amaoe Stencil-Original BS2 is a high-precision BGA (Ball Grid Array) reballing stencil specifically engineered for the repair and maintenance of high-end Qualcomm Snapdragon chipsets. Renowned in the mobile microsoldering industry, the Amaoe brand is synonymous with “Square-Hole” technology, which facilitates easier chip release and more consistent solder ball formation compared to traditional round-hole stencils. Amaoe Stencil-Original BS2
The BS2 model is part of the “B” series, which typically focuses on specific flagship Android processor families. This particular stencil is a staple for technicians working on devices powered by the Snapdragon 845 (SM845) and Snapdragon 855 (SM8150) architectures. Amaoe Stencil-Original BS2
Technical Specifications: Amaoe BS2
The following table outlines the core physical and technical parameters of the Amaoe BS2 stencil.
| Feature | Specification |
| Model Number | BS-2 / BS2 |
| Manufacturer | Amaoe (Original) |
| Material | High-Grade 304 Stainless Steel |
| Manufacturing Process | High-Precision Laser Cutting |
| Aperture Shape | Square Holes (Tapered for easy release) |
| Stencil Thickness | $0.12\text{ mm}$ |
| Supported Chipsets | Qualcomm SDM845, SM8150 (Snapdragon 845/855) |
| Pitch Support | $0.8\text{ mm}$ |
| Net Weight | Approx. $0.01\text{ kg} – 0.02\text{ kg}$ |
| Application | BGA Reballing / Solder Paste Imprinting |
| Heat Resistance | Up to $450^\circ\text{C}$ (deformation resistant) |
Detailed Component Compatibility
The BS2 is not just a “one-chip” tool; it is a comprehensive reballing solution for the entire power and processing ecosystem of 2018–2019 flagship devices. It includes cutouts for:
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CPUs: Snapdragon 845 (SDM845) and Snapdragon 855 (SM8150).
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Audio ICs: WCD9340 and related codecs.
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Wi-Fi/BT ICs: WCN3990.
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Power Management (PMIC): PM8005 and associated power ICs for the Black Shark and Xiaomi series.
Key Features & Professional Benefits
1. The 0.12mm Standard
The thickness of a stencil is the most critical factor in reballing. At $0.12\text{ mm}$, the BS2 provides the perfect volume of solder paste. If a stencil is too thin ($0.10\text{ mm}$), the resulting solder balls may be too small to create a reliable connection. If too thick ($0.15\text{ mm}$), the balls may bridge (short circuit) during the reflow process. Amaoe’s $0.12\text{ mm}$ is widely considered the “Goldilocks” zone for modern smartphone ICs. Amaoe Stencil-Original BS2
2. Square Hole Design
Unlike cheaper etched stencils that use round holes, Amaoe uses laser-cut square holes with a slight internal taper.
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Easier Release: Solder paste is less likely to stick inside the corners of a square hole when lifting the stencil.
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Uniformity: Ensures that every single pad on a 1225-pin CPU receives the exact same amount of paste.
3. Thermal Stability
Reballing involves heating the stencil while it is clamped to the chip. Cheap materials warp under heat, causing the “middle” of the stencil to pop up and ruin the alignment. The Amaoe BS2 uses premium steel that maintains its flat profile even when subjected to the $300^\circ\text{C}$ to $350^\circ\text{C}$ temperatures required for leaded or lead-free reballing. Amaoe Stencil-Original BS2
4. Anti-Drumming Grooves
Modern Amaoe stencils often feature “anti-drum” or expansion grooves. These are small laser-cut lines between the chip patterns that allow the metal to expand and contract without bowing, ensuring the stencil stays flush against the PCB or IC during the heating phase. Amaoe Stencil-Original BS2
Usage and Maintenance Guidelines
To ensure the longevity of the BS2 stencil (which can last for hundreds of repairs if handled correctly), technicians should follow these best practices:
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Cleaning: Use 99.9% Isopropyl Alcohol (IPA) and a soft-bristled brush immediately after use. Do not let solder paste dry inside the apertures.
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Storage: Store in a rigid protective sleeve. Even a slight bend in the $0.12\text{ mm}$ steel can make the stencil unusable for high-pin-count CPUs.
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Paste Application: Use a high-quality “Medium Temperature” ($183^\circ\text{C}$) solder paste for best results. Apply at a $45^\circ$ angle with a flat scraper.
Effortless Precision for Electronics Repair
The Amaoe Stencil-Original BS2 is meticulously crafted to help you achieve seamless repairs in electronics. Whether you’re working on mobile phones, tablets, or other intricate devices, this stencil guarantees flawless alignment and precision for soldering with minimal effort. Experience the perfect blend of reliability and functionality in every use. Amaoe Stencil-Original BS2
Durability That Stands the Test of Time
Constructed with high-quality materials, the Amaoe Stencil-Original BS2 ensures durability and longevity, making it an essential tool for professionals and DIY enthusiasts alike. Its robust design resists wear and tear while maintaining its performance, enabling you to focus on delivering consistent results with confidence.
The Ideal Companion for Repair Enthusiasts
Lightweight and easy to handle, this stencil streamlines your repair tasks with impressive efficiency. Designed for compatibility with a wide array of devices, Amaoe Stencil-Original BS2 empowers you to tackle diverse projects without hassle. Elevate your repair game with this indispensable tool in your arsenal.
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