Frequently Asked Questions

We support all major industry-standard CAD environments to ensure seamless file translation. This includes Altium Designer, Cadence Allegro, and Mentor Graphics PADS. We also utilize Valor NPI for comprehensive DFM verification.

Design for Manufacturing (DFM) is the process of reviewing and optimizing a PCB layout specifically for the fabrication process. It prevents costly errors like acid traps, insufficient annular rings, or copper thieving. Integrating DFM early reduces production costs, improves yield, and accelerates time-to-market.

Yes. Our engineering team can extract trace layouts, inner multilayer stackups, and part specifications from legacy hardware. We utilize non-destructive tomographic scanning and manual tracing to rebuild the schematic and provide an updated, modern manufacturing package.

A blind via connects an outer layer of the PCB to one or more inner layers but does not go entirely through the board. A buried via connects two or more inner layers and is completely hidden from the outside surfaces. Both are essential for High Density Interconnect (HDI) designs.

We use advanced field solver software to calculate trace widths, copper weights, and dielectric spacing for single-ended and differential pairs. We factor in the specific core and prepreg materials that will be used during fabrication to ensure the manufactured board matches the exact modeled impedance (typically within a ±5% to ±10% tolerance).

To provide an accurate quote and timeline, we need your Schematic (or Netlist), a preliminary Bill of Materials (BOM), physical board dimensions (DXF or IDF), and a list of any special routing constraints (e.g., high-voltage isolation gaps, specific component placement zones, or impedance requirements).

Yes, if you have a hand-drawn sketch or a conceptual block diagram, our electrical engineers can convert it into a fully verified, intelligent CAD schematic database ready for layout and netlist generation.

Absolutely. Through Value Engineering (VE), we analyze your design to see if layer counts can be reduced, if blind/buried vias can be eliminated to save lamination cycles, or if panelization can be improved to waste less material. We also cross-reference your BOM to find more cost-effective component alternatives without sacrificing performance.

DFT involves adding specific test points, boundary scan networks, and accessible pads to the PCB layout. This ensures that once the board is assembled, automated machines (like In-Circuit Testers or Flying Probes) can electrically probe every net on the board to quickly isolate manufacturing defects.

Turnaround time relies heavily on complexity. A simple 2-to-4 layer board might take 3 to 5 days, while a highly complex 24-layer HDI board with high-speed digital constraints might take 3 to 4 weeks. We establish a clear timeline and milestone check-ins before the project begins.

We fabricate boards using a wide variety of substrates to meet different thermal and electrical requirements. This includes standard High-Tg FR4 (170C, 180C), Rogers (for RF & Microwave), Polyimide (for flex/rigid-flex circuits), and mixed-material layups.

Our advanced fabrication facilities are capable of manufacturing highly complex, multi-layer printed circuit boards containing up to 40 to 56 layers, depending on the specific design complexity, material choices, and via structures (such as blind, buried, and microvias).

We offer a comprehensive selection of surface finishes to accommodate any assembly requirement, including ENIG (Electroless Nickel Immersion Gold), HASL (Hot Air Solder Leveling), Lead-Free HASL, Hard Gold, Immersion Silver, and OSP (Organic Solderability Preservative).

Our standard fabrication time for rigid FR4 boards (up to 8 layers) is 5 to 10 business days. However, we specialize in Quick-Turn Fabrication and can deliver prototype boards in as little as 24 to 48 hours for time-critical projects.

With our advanced direct imaging and etching processes, we can consistently achieve trace widths and spacing down to 3.0 mil / 3.0 mil (0.076mm) on standard production runs, with even tighter tolerances available for specialized HDI requirements.

Yes. We utilize high-quality Polyimide substrates and coverlays to manufacture both pure flex circuits and complex rigid-flex assemblies, ideal for aerospace systems, medical wearables, and compact electronics.

Yes, we offer heavy copper fabrication (up to 20 oz or more depending on the layout) for high-current power supplies, electric vehicle (EV) charging systems, and industrial motor controls, allowing for superior heat dissipation.

For BGA routing where vias must be placed directly into component pads, we provide epoxy via-fill, conductive via-fill, and complete overplating (capped vias) following IPC-4761 Type VII guidelines to prevent solder wicking during assembly.

Yes, all standard fabrication processes default to RoHS (Restriction of Hazardous Substances) compliance using lead-free surface finishes (like ENIG or LF-HASL) and high-Tg substrates capable of withstanding the higher temperatures required for lead-free reflow.

No, we do not require a minimum order quantity. We routinely manufacture batches as small as 1 to 5 pieces for prototyping and R&D, while seamlessly scaling up to 10,000+ pieces for volume production runs.

SMT (Surface Mount Technology) components are placed directly onto solder paste on the surface pads of the PCB, allowing for high-speed, dense automation. Through-Hole (THT) involves components with leads inserted into drilled holes and soldered on the opposite side, which provides stronger mechanical bonds for heavy connectors. We offer both, as well as mixed-technology assemblies.

Yes. We have specialized BGA rework stations and skilled technicians who can safely remove, reball, and replace BGA components. We follow up all BGA rework with 3D X-Ray Inspection to ensure joint integrity under the package.

Absolutely. While most commercial applications require RoHS (lead-free) compliance, we maintain separate, dedicated production lines for traditional Leaded assemblies to support our Aerospace, Defense, and Medical customers who require it for mission-critical reliability.

We offer both. For Consigned Assembly, you provide the parts kit and bare boards, and we handle the assembly. For Full Turnkey Assembly, our procurement team sources all components through authorized distributors, fabricates the bare board, and completely assembles the final product.

Our high-speed robotic pick-and-place equipment is capable of precisely placing ultra-miniature passive components down to the 01005 package size, as well as ultra-fine pitch BGAs and QFNs with a pitch as tight as 0.3mm.

Yes. Double-sided SMT assembly is standard for dense designs. We apply solder paste and components to the top side, reflow it, then use specialized adhesives to hold heavy components in place while the board is flipped and run through the reflow oven a second time for the bottom layer.

Yes, for electronics deployed in harsh environments (moisture, dust, extreme temperatures), we provide automated and manual conformal coating (Acrylic, Silicone, Polyurethane) as well as epoxy potting to encapsulate and protect the entire assembly.

We predominantly use No-Clean solder paste for most commercial and industrial applications to eliminate post-reflow washing cycles. However, we also support Water-Soluble and Rosin Mildly Active (RMA) pastes when specific military/aerospace contracts require thorough aqueous cleaning.

We strictly adhere to J-STD-033 for handling MSDs. Components are kept in temperature- and humidity-controlled dry cabinets. If a part's floor life is exceeded, it undergoes a controlled pre-bake process in our industrial ovens before reflow to prevent package cracking (popcorning).

Yes, our services extend far beyond the circuit board. We provide full "Box Build" electromechanical assembly, including routing custom cable harnesses, mounting PCBs into metal or plastic enclosures, and installing final user-interface hardware (buttons, screens, overlays).

Because BGA solder joints are hidden beneath the component body, we utilize 3D X-Ray Inspection (AXI). This allows us to see through the package and detect internal solder voids, shorts, or cold joints down to the microscopic pad level.

Altest Corporation is committed to the highest standards. We are ISO 9001:2015, ISO 13485:2016 (Medical), and AS9100D (Aerospace) certified. We are also fully ITAR Registered, SAM Registered, and comply with IPC J-STD-001 standards.

Flying Probe testing is an automated, fixtureless testing method. It uses electro-mechanical probes that "fly" across the board to test for opens, shorts, resistance, capacitance, and component placement. It is highly efficient for prototypes and low-to-mid volume runs because it doesn't require a custom bed-of-nails fixture.

AOI utilizes high-resolution cameras and advanced software algorithms to visually inspect every surface-mount component immediately after the reflow oven. It catches misalignments, missing components, tombstoning, and visible solder bridges significantly faster and more accurately than a human inspector.

Yes, if you provide the test fixtures and software scripts, our technicians will perform full functional testing to simulate the final operating environment of the board. This ensures the firmware boots correctly and the board passes all logic operations before it ships.

We primarily source directly from franchised, authorized distributors. If a part is obsolete and must be bought on the gray market, we employ strict AS6081 testing protocols, which include XRF material analysis, decapsulation, and high-power microscopy to verify that the part is genuine and not counterfeit.

Burn-in testing involves placing the fully assembled board into a specialized thermal chamber and powering it on while cycling the temperature. This artificial aging process forces any weak or defective components to fail in the factory (preventing infant mortality) rather than failing in the field.

Yes, particularly for Aerospace and Defense clients governed by AS9100, we provide AS9102-compliant First Article Inspection reports. This comprehensive document verifies that the very first unit produced matches every single dimension, electrical value, and material requirement outlined in the blueprint.

Our entire inspection and quality assurance team is certified to IPC-A-610 and J-STD-001 standards. Depending on the product’s end-use environment, we inspect boards to Class I (general electronics), Class II (dedicated service), or the rigorous Class III (high reliability/mission critical) requirements.

Under our ISO 9001 Quality Management System, any failed board triggers a formal Non-Conformance Report (NCR) and Root Cause Analysis (RCA). The board is immediately quarantined. Our engineering team determines if it can be safely reworked (e.g., replacing a bad IC) or if it must be scrapped, ensuring the defect never reaches the customer.