Amaoe SAM12 BGA Reballing Stencil-Original
The Amaoe SAM12 BGA Reballing Stencil-Original is a professional-grade BGA (Ball Grid Array) reballing stencil specifically engineered for high-precision motherboard repairs on the Samsung Galaxy S20 series. Known for its durability and “Superhard” steel construction, this stencil is a staple for technicians performing CPU swaps, IC replacements, or fixing “black screen” issues caused by solder joint fractures. Amaoe SAM12 BGA Reballing Stencil-Original
Technical Specifications
The following table details the physical and compatibility specifications for the original Amaoe SAM12 stencil.
| Feature | Specification |
| Brand | Amaoe (Original “阿毛易修”) |
| Model Number | SAM12 (SAMSUNG-12) |
| Material | High-Quality Stainless Steel (Japanese Imported Steel) |
| Thickness | 0.12mm (Standard Precision Thickness) |
| Hole Type | CNC Precision Square Holes with Rounded Corners |
| Heat Resistance | High-Temperature Resistant (Anti-Bulge Design) |
| Primary Chip Support | Qualcomm Snapdragon 865 (SM8250) & Exynos 990 |
| Compatible Series | Samsung Galaxy S20, S20+, S20 Ultra |
| Dimensions | Approx. 100mm x 80mm (Stencil Sheet) |
| Application | BGA Reballing / Solder Tin Planting |
Comprehensive Chip & Component Compatibility
The SAM12 is not a universal stencil; it is a multi-IC template designed to cover almost every critical chip found on the S20-series logic board. This eliminates the need for multiple stencils during a single repair. Amaoe SAM12 BGA Reballing Stencil-Original
1. Central Processing Units (CPUs) & RAM
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Qualcomm Snapdragon 865 (SM8250): Used in US and Chinese variants.
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Samsung Exynos 990: Used in International/Global variants.
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LPDDR5 RAM: Specifically etched for the “sandwich” (PoP – Package on Package) memory that sits atop the CPU.
2. Power Management & Audio ICs
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PM8150 / PM8150C / PM8150B: Main Power Management ICs (PMIC).
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PM8250: Specialized PMIC for the Snapdragon 865 chipset.
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MAX77705F: Specialized Power Management IC often related to charging/display.
3. RF and Connectivity
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SDR865: The Radio Frequency (RF) transceiver.
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PMX55 / SDX55M: Power management for the 5G Modem.
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S5200A: Power Management/RF related components.
Key Design Features
1. The 0.12mm Thickness Advantage
Amaoe utilizes a 0.12mm thickness, which is widely considered the “Goldilocks” zone for mobile repair.
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Thinner (0.10mm) stencils can warp under the heat of a rework station.
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Thicker (0.15mm) stencils often result in solder balls that are too large, causing bridges (shorts) between the incredibly fine pins of the Snapdragon 865.
2. Square Hole Technology
While cheaper stencils use circular etched holes, the SAM12 features square holes with chamfered (rounded) corners. This design serves two purposes:
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Easy Release: It prevents the solder paste from “sticking” inside the holes when you lift the stencil.
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Ball Formation: During the heating process, the square solder paste deposit naturally pulls into a perfect sphere due to surface tension, ensuring uniform ball height across the hundreds of pins on the SM8250 CPU.
3. Anti-Bulge Heat Dissipation
The stencil is designed with specific cooling vents and layout spacing to prevent the “drum effect”—where the center of the stencil bulges upward when heated. This ensures the stencil remains flat against the chip, preventing solder from leaking between the pads. Amaoe SAM12 BGA Reballing Stencil-Original
Usage Professional Tips
To get the most out of your original Amaoe SAM12, follow these industry best practices:
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Solder Paste Selection: Use a high-quality 183°C (Leaded) or 138°C (Low-Melting) solder paste depending on the sensitivity of the surrounding components.
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Cleaning: Always clean the stencil with PCB cleaner or 99% Isopropyl Alcohol immediately after use. Dried solder paste in the 0.12mm holes is difficult to remove and can ruin subsequent reballing attempts.
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Alignment: Use a microscope to ensure the IC pads are perfectly centered in the stencil’s square apertures before applying paste.
Enhanced Precision for BGA Repair
The Amaoe SAM12 BGA Reballing Stencil is meticulously crafted to streamline and enhance your Ball Grid Array (BGA) repair process. Built with durability and accuracy in mind, this stencil allows quick and error-free reballing, ideal for professional use or personal repair projects. Amaoe SAM12 BGA Reballing Stencil-Original
Designed for Efficiency
Engineered to save time and effort, the Amaoe SAM12 features a high-quality construction that offers excellent heat resistance and precise alignment for soldering tasks. Whether you’re repairing mobile devices, laptops, or other electronics, this stencil ensures consistent and reliable results. Amaoe SAM12 BGA Reballing Stencil-Original
Your Trusted Reballing Solution
With the original Amaoe SAM12 BGA Reballing Stencil, you can elevate your repair work to the next level. Its compatibility with various chip sizes and intricate designs makes it the go-to choice for technicians and DIY enthusiasts seeking a dependable tool for advanced electronics repair. Amaoe SAM12 BGA Reballing Stencil-Original
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