Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450

Product Specification Table

Specification Category	Details
Product Name	Amaoe U-QSD12 CPU IC Reballing Stencil – Original
Model / SKU	U-QSD12
Brand	Amaoe
Product Type	CPU IC BGA Reballing Stencil
Primary Application	Precision reballing and solder paste application for Qualcomm Snapdragon CPU ICs
Compatible Chipsets	Qualcomm Snapdragon SM7635, SM7550, SM6450, SM4450
Supported Device Segment	Mid-range to upper-mid-range Android smartphones using the above Snapdragon SoCs
Stencil Category	U-Series CPU IC Reballing Stencil
Target Repair Level	Chip-level motherboard repair (CPU reballing / rework)
Material	Premium stainless steel (high-elasticity, corrosion-resistant)
Manufacturing Method	High-precision laser / chemical etching
Standard Thickness	0.12 mm (industry-preferred thickness for mobile CPU BGA reballing)
Optional Thickness Variants	0.10 mm or 0.15 mm (availability depends on seller)
Aperture Shape	Square / rounded-square micro apertures
Aperture Design Purpose	Optimized to ensure uniform solder volume and prevent solder bridging
Pad Alignment Accuracy	Micron-level alignment precision for Snapdragon CPU pad layouts
Supported Ball Size Range	Typically 0.30 mm – 0.45 mm (depending on SoC pad pitch)
Recommended Solder Alloy	SAC305 (Sn96.5 / Ag3.0 / Cu0.5) or equivalent Pb-free alloy
Flux Compatibility	No-clean flux, water-soluble flux, RMA flux
Surface Finish	Smooth matte finish for improved solder release and visibility
Flatness / Planarity	High planarity maintained to ensure even contact with CPU IC surface
Edge Treatment	Fully deburred edges to avoid PCB or IC damage
Stencil Size	Sized to fully cover Snapdragon CPU BGA footprint (exact dimensions vary by batch)
Weight	Lightweight (approx. 5–15 g)
Reusability	Fully reusable with proper cleaning and handling
Expected Service Life	Dozens to hundreds of reball cycles under professional use
Cleaning Method	Isopropyl Alcohol (IPA), soft brush, ultrasonic cleaner (recommended)
Operating Temperature	Room temperature for stencil use; reflow temperature depends on solder paste
Reflow Compatibility	Hot air station, IR rework station, BGA rework machine
Included Items (Standard Pack)	1 × Amaoe U-QSD12 stainless steel stencil
Optional Kit Items	Magnetic base, positioning plate, alignment jig, blades (sold separately)
Packaging Type	Anti-static protective sleeve with cardboard or plastic outer pack
Storage Recommendation	Store flat, dry, dust-free environment (20–25 °C, <60% RH)
Handling Precautions	Avoid bending; handle by edges only; do not touch aperture area
Compliance	RoHS-compatible (supports lead-free repair workflows)
Country of Origin	China (Amaoe original manufacturing)
Warranty	Seller-dependent (manufacturing defect only)
Typical Use Environment	Professional mobile repair labs, motherboard repair centers
Skill Level Required	Intermediate to advanced chip-level technician
Typical Market Positioning	Professional-grade CPU IC reballing tool
Common Failure Repairs	CPU no-power issue, boot loop, dead phone, thermal pad failure
Quality Control	Factory-tested aperture alignment and thickness consistency
Seller Notes	Always confirm stencil pattern matches exact CPU package revision

🧠 Technical & Usage Explanation

1. Purpose of the U-QSD12 Stencil

The Amaoe U-QSD12 CPU IC Reballing Stencil is specifically engineered for Qualcomm Snapdragon SM-series CPUs used in modern Android smartphones. These SoCs use fine-pitch BGA (Ball Grid Array) packaging, requiring extreme accuracy during reballing to restore reliable electrical connections between the CPU and motherboard. Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450

2. Why 0.12 mm Thickness Is Ideal

A 0.12 mm stainless steel thickness provides the best balance between:

Structural rigidity (prevents warping)
Correct solder volume transfer
Clean ball formation during reflow

This thickness is widely accepted for Snapdragon CPU reballing.

3. Precision Aperture Engineering

The stencil apertures are micro-etched to match the exact pad geometry of SM7635, SM7550, SM6450, and SM4450 CPUs. Proper aperture design:

Ensures uniform solder ball height
Reduces risk of shorts or cold joints
Improves reflow success rate

4. Recommended Reballing Workflow

Clean CPU pads thoroughly
Align U-QSD12 stencil using jig or magnetic holder
Apply solder balls or paste evenly
Remove excess material with squeegee
Lift stencil vertically (no sliding)
Perform controlled reflow
Inspect under microscope

5. Cleaning & Maintenance

Clean the stencil immediately after use:

IPA + soft brush for light residue
Ultrasonic cleaning for heavy flux buildup Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450

Avoid scraping apertures with sharp tools. Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450

6. Storage & Longevity

Proper storage dramatically increases lifespan:

Keep flat in anti-static sleeve Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450
Avoid humidity and mechanical stress Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450
Do not stack heavy objects on stencil Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450

Amaoe U-QSD12 CPU IC Reballing Stencil-Original For Qualcomm Snapdragon SM7635 / SM7550 / SM6450 / SM4450