工程常用英语

鑽孔加工

1.The tolerance of NPTH +0.05/-0mm is too tight to meet.

Relax it to: +/-0.05mm.

2.The tolerance of the slot is 0.0365”+/-0.001”. For ease of manufacture capability we suggest to relax it to 0.0365’’+/-0.002’’.

3.The tolerance of the holes with dia.0.92mm & dia.2.3mm is +/-0.05mm.We couldn’t ensure this tolerance to PTH at all.

Suggestion: Relax it to +/-0.076mm.

4.There is a small overlap between the two PTH.

Suggestion: We will build the holes as the slots 1.30mm*3.5mm. Please confirm.

5.The finish hole size on the drill chart is different from the Gerber data.

Drill chart :0. 6mm. Gerber data:0. 675mm.

Drill chart: 2.0mm. Gerber data: 2.1mm. See attachment 3

Suggestion: We will follow the Gerber data.

Please confirm!

6.There are some duplicate holes in the Gerber. For attachment 8, if there are no slots we will only retain one NPTH. For attachment 7 we will remove the small hole.

7.The quantities of the stamp holes on the drawing (19) are different from the Gerber data (11). We will build the PCB according to the Gerber data.

8.We will use routing process to build the slots because of the long slots will take long time during drilling process.

But the tolerance of the slots is only +/-0.05mm.For ease of manufacture capability we suggest to relax it to +/-0.127mm.

9.The size of the two PTH (dia.1.6mm) is just the same as the Pads and the solder mask openings.

Suggestion: We couldn't build the PTH without annular ring so please choose A or B: A: Build the two holes as NPTH and we will enlarge S/M opening and keep the clearance 0.003" each side.

B: Build the two holes as PTH and we will enlarge the pads and keep the annular ring 0.008" and also will enlarge the S/M opening and keep the clearance 0.003" each side. We will build the rectangle slot (1.7X3.0mm) as oval one.

10.The quantity of the stamp holes on the drawing (19) is different from the Gerber data

(11).

Suggestion: We will build the PCB according to the Gerber data.

11.There are some data on the drill map are different from the Gerber data. Suggestion: We will follow the Gerber data to build the PCB.

內層問題

1.All the non functional pads are to be removed on inner layers.

2.The width of the isolated line on layer 3 is only 0.010".

Suggestion: We will change it to 0.012". Please confirm!

外層線路問題

1.We will etch our company logo, UL logo, reverse “UR” and Date Code on backside. (Location sees attachment V)

2.The pad of the PTH (dia.0.131”) is so close to the outline on both sides. It will be damaged after routing process.

Suggestion: In order to avoid copper exposure of the pad, we will properly shave the edge of the pad on both side and keep the space 0.010” to the outline. We will also narrow the corresponding solder mask opening.

3.The distance between the circular lines and the outline is too short only 0.0036" on component side. It may cause copper exposedness.

4.We will properly narrow the space between the circular lines to keep the distance 0.018" between the lines to the V-cut line.

5.The distance between the copper and the outline is two short only 0.003" on both sides. We will shave the copper to keep the space 0.018" between the copper and the V-cut line. 防焊問題

1.The size of some pads’solder mask opening is just the same as the pads (edit Gerber). We propose to enlarge the solder mask opening and keep the clearance 3mil each side. (Example sees attachment VII)A matt (non glossy) green solder mask

2.All via holes including BGA via holes have solder mask opening on both sides. Suggestion: Please choose a) or b)

a)Follow the Gerber.

b)To Plug via holes in the BGA and the other via holes are to be followed the Gerber.

3.The space between the IC pads is only 0.0077”. It is difficult to keep solder mask bridge. Suggestion: For ease of manufacture capability, we suggest to remove these solder mask bridge. Please confirm.

4.The solder mask opening of the fiducial mark is too large and it will cause to copper exposure of the trace around it.

Suggestion: we will properly shave the edge of the fiducial mark's solder mask opening and keep the space 0.004" to the trace. Please confirm!

5.Here are some via holes only have single side solder mask opening (solder side). Please choose A or B:

A: Follow the Gerber data and accept the appearance of the solder ball on solder side.

B: Add solder mask opening to these holes (the same size as drill bit) on component side.