Advanced V Groove Etch Input Panel
Formula Used
The calculator treats the groove as a triangular V channel. All main dimensions use millimeters.
Included angle = 2 × atan((top width / 2) / depth)Top width = 2 × depth × tan(included angle / 2)Depth = (top width / 2) / tan(included angle / 2)Raw etch time = depth / vertical etch ratePlanned time = raw time / efficiency × safety factorUndercut each side = lateral undercut rate × planned timeMask opening = final top width - total undercutCross-section area = 0.5 × top width × depthVolume = cross-section area × groove length × quantity
How to Use This Calculator
- Select the geometry mode that matches your known data.
- Enter depth, width, or angle as required by that mode.
- Add groove length and batch quantity.
- Enter vertical etch rate and lateral undercut rate.
- Add efficiency, density, cost rate, and safety factor.
- Press the calculate button.
- Review mask opening, time, material removal, and chart values.
- Download CSV or PDF when you need a record.
Example Data Table
| Case | Depth mm | Top Width mm | Rate mm/min | Efficiency % | Use Case |
|---|---|---|---|---|---|
| Fine Channel | 0.80 | 1.60 | 0.035 | 88 | Small etched guide feature |
| Standard Groove | 1.50 | 3.00 | 0.050 | 85 | General planning estimate |
| Wide Groove | 2.00 | 6.00 | 0.070 | 80 | Open flow channel |
| Deep Groove | 3.20 | 4.50 | 0.045 | 78 | High aspect planning |
V Groove Etch Planning Guide
Why V Groove Etch Math Matters
A V groove looks simple, yet its final shape depends on many linked inputs. Depth, top width, included angle, etch rate, and undercut all affect the finished channel. This calculator helps you convert those values into practical process numbers. It is useful for early design work, quoting, inspection planning, and batch comparison. The tool keeps the method clear. It also shows where assumptions may create risk.
Geometry and Process Control
The groove is modeled as a triangular section. When depth and width are known, the included angle is calculated. When depth and angle are known, the top width is calculated. When width and angle are known, the depth is calculated. This lets one page support several design workflows. The time estimate uses vertical etch rate. Efficiency and safety factor adjust that time for real process behavior.
Mask Opening and Undercut
Undercut is important because the etched feature may grow sideways. The calculator estimates lateral loss on each side. It then subtracts total undercut from the final top width. The result is the suggested mask opening. A zero mask opening warning means the selected values are not practical. In that case, reduce process time, reduce lateral attack, or increase target width.
Volume, Mass, and Cost
Material removal is estimated from cross-section area and groove length. Batch volume is converted into cubic centimeters. Density converts volume into mass. A cost rate can estimate process cost for removed material. These outputs are planning values, not a substitute for lab validation. Use real trials for final specifications. Still, the calculator can reduce guesswork. It can also help compare design options before production.
Frequently Asked Questions
1. What is a V groove etch calculation?
It estimates the depth, width, angle, time, undercut, and material removal for a triangular etched groove.
2. Which units should I use?
Use millimeters for dimensions, millimeters per minute for rates, and grams per cubic centimeter for density.
3. What does included angle mean?
Included angle is the full angle inside the V shape, measured between both sloped groove walls.
4. Why is mask opening smaller than final width?
The calculator subtracts estimated lateral undercut because the etch can expand sideways during processing.
5. What is etch efficiency?
Etch efficiency adjusts ideal rate behavior. Lower efficiency increases the planned time needed to reach target depth.
6. Can this calculator replace test etching?
No. It is a planning tool. Final work should be checked with actual material tests and process records.
7. Why does undercut create a warning?
A warning appears when sideways etching consumes too much of the required mask opening.
8. What does the chart show?
The chart shows estimated depth growth and width development across the planned etch time.