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Multilayer PCB Design
Bit Mapper - VLSI Design & Training
Bit Mapper has been in the field of PCB Design for the last 18 years. We have migrated from designing Single Layer PCB's to Multilayer PCB's with Advanced features such as Signal Integrity Check...etc.


With Bit Mapper, It is correct Design First Time, Every Time.

Support of our clients has enabled us to upgrade our service, gain experience & insight such that 

  • Our backbone is our in house system design experience of 20 years and our VLSI design and training experience of the last 7-years. 
  • We are the only company who is an End to End Solution Provider, when it comes to design of Electronic Equipment. [Our PCB Design Solution forms a part of the COMPLETE DESIGN] 
  • Our Experience of designing in-house and Clients products gives Value Addition to our clients as we can Foresee and THEREFORE Understand and THUS Appreciate our clients Inputs, Requirements and Constraints. 
  • Service, Quality, CAD Compatibility, Experience and a Short turn around time are not mere keywords for us, we have been living them for the last 18 years.
  • We Support and Partner with Clients to work as an Offsite Design Team and provide them with a Dependable PCB Design Source. 
  • We started with the CAD tools of the late 1980's and migrated to PCB analysis tools in 96-97. 
  • We have processed Multi-Layer PCB's with mixed components on both the sides.
  • We have designed boards with packages such as BGA, FBGA, and CSP.
  • Use Auto router is limited to evaluate the correctness / efficiency of placement & density of routing. Manual routing & DFM is followed with post routing cleanup. 
  • We insist that the we are a part of the clients design team. 
  • We offer on line Service to our Distant Clients. [We live in a Wired World] 
Bit Mapper - VLSI Design & Training
Cad Tools
Bit Mapper - VLSI Design & Training
image021.jpg (1656 bytes) From ZUKEN with 
  • High speed routing. 
  • Signal integrity with IBIS models. 
  • EMI / EMC Analysis. 
  • Reflection and Cross Talk Analysis. 
  • Termination Advisor
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Excelcam Design for manufacturability, Analysis of acid traps.
image024.jpg (1964 bytes) From WINTEK Corporation with 
  • Auto routing and Auto placement.
  • Import and Export for different CAD tools
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Highlights Of Our Service
Bit Mapper - VLSI Design & Training
  • High Speed, High Density PCB Design
  • BGA's and Fine Pitch-High Pin count devices
  • Mix Technology Analogue / Digital PCB Designs
  • Design for EMC - reduced EMI and noise susceptibility
  • Design Constraint Requirements  (i.e. Differential Routing, Controlled Lengths/Delay, Crosstalk Control, etc.)
  • Handling Special nets
    • Ground Shielding on special nets.
    • Managing Skew problems - issues like pin ordering, branching, fixed length nets, Differential nets ...etc. 
  • Clock nets - special care is provided to clock nets, which includes clock tree design with proper termination(s). 
  • Adding Automatic Test points - as part of DFT ( as required by ATE's). 
  • Design for Manufacturing
    • Selecting correct style of copper pouring on Power and Ground nets. To avoid bridging when soldered on wave soldering machines. 
  • Design for Economy -
    • Designing Split Power Planes to reduce the number of overall layers.
  • User Constraints
    • Via and Net delays for high speed traces.
    • Net Frequency and Net Current for critical signals.
  • Impedance Control
  • Multilayer, Surface Mount and Mixed Technologies
  • Complete Signal Integrity (includes)
    • Measurements - viz.
      Net lengths, Impedance(s), Rise / Fall time, Overshoot / Undershoot. 
    • Analysis
      Cross talk, Reflection including Termination Adviser. 

 

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Capabilities
Bit Mapper - VLSI Design & Training

  • Analog

  • BGA /FFBGA

  • Controlled Impedance

  • D/S / Through Hole / SMD

  • Digital Design

  • VME Boards

  • High Speed

  • Mix Technology Analogue / Digital PCB Designs

  • Military

  • PCI-X

  • PCI Add On

  • DSP Boards

Technical Inputs - Required From Client
Bit Mapper - VLSI Design & Training
  • A NEATLY drawn and COMPLETE Schematic diagram.
  • Electrical and Mechanical specifications of all components (Component Datasheets preferred). 
  • PCB FORM Factor - shape and size, including details of mounting...etc.
  • Layout Guidelines with specifications of sensitive / high speed nets, components...etc.
  • Capability report of the PCB Manufacturer. 
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  Complexity Expertise Expertise
Board size Few square inches to 100+ square inches
Layers (no.s) 2 - 16
Frequency (Electrical) Few KHz to 500 MHz
No. of nets (nos) 10000+ on a single controlled impedance board
Density (pins/sq inch) 120 +
No. of components on a single board 1500 + with 8 BGAs
Voltages on a single board 1 - 8 (like +12V, 3.3V, 2.5V, 1.5V  etc.)
Different logic families on single board 1 - 6+ (SSTL, HSTL, LVPECL etc.)
Trace widths on single board 4 mil - 40 mil
Range of designs Single chip evaluation boards to FPGA Boards
  Range of target applications Consumer electronics board to High Reliability Industrial/Telecom boards  
  Range of components Simple logic devices to multi-million gate FPGAs and ASICs  
   
Bit Mapper - VLSI Design & Training
Deliverables
Bit Mapper - VLSI Design & Training
  • Schematic, Final Net-list
  • PCB layout files
  • Gerber Files for all layers in RS 274-X format with embedded apertures
  • N.C. Drill file in Excellon format
  • Drill Drawing (Fab Drawing)
  • Layer stack report
  • Pick and Place information for Automated assembly (If Required).
  • Bill of Material (BOM)
  • IPC 356 (If Required)
  • Signal Integrity analysis (optional)
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Bit Mapper - VLSI Design & Training
Verification
Bit Mapper - VLSI Design & Training
  • Air gap
  • Hanging traces
  • Mechanical fit
  • Cross Probing of Schematic and PCB's
  • DRC (Design Rule Checking)
  • Silk-screen overlap
  • Gerbers using ExcelCAM
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Bit Mapper - VLSI Design & Training
Our Strength
Bit Mapper - VLSI Design & Training
  • Awareness and Appreciation of high speed issues like Signal Integrity, Control Impedance, Skew ..etc [ we are primarily a VLSI Design and Training Company].
  • We extend our experience of high speed Digital Design [ including multimillion gate FPGA's, PCI and DSP based solutions ] to PCB design.
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Bit Mapper - VLSI Design & Training
Our Belief
Bit Mapper - VLSI Design & Training
  • We are a part of the clients design team, and his active involvement is the preferred way of completing the design successfully and in time.
  • Any tool is ONLY as good as the person handling it. 
  • Technology is there to change, Skills are there to stay. 
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Bit Mapper - VLSI Design & Training
Bit Mapper - VLSI Design & Training

 

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