原创 DFT_nail _select_rule

 2019-4-21 06:56  1228 6 6 分类: 测试测量

Select nail rule
	Test probe's size		Safe Distance	Remark
Nail to Nail （Between test points center distance）	39mil to 39mil		38mil	such size of test probe will cause more NTF
	39mil to 50mil		43mil	such size of test probe will cause more NTF
	50mil to 50mil		50mil	such size of test probe will cause more NTF
	50mil to 75mil		58mil	such size of test probe will cause more NTF
	75mil to 75mil		68mil
	75mil to 100mil		77mil
	100mil to 100mil		86mil
Nail to device body (Test point center to device border distance)	39mil	3mm below height device	16mil	such size of test probe will cause more NTF
	50mil		20mil	such size of test probe will cause more NTF
	75mil		24.5mil
	100mil		29.5mil
	39mil	3mm-5mm height device	36mil	such size of test probe will cause more NTF
	50mil		40mil	such size of test probe will cause more NTF
	75mil		47mil
	100mil		54mil
	39mil	5mm-8mm height device	65.5mil	such size of test probe will cause more NTF
	50mil		70mil	such size of test probe will cause more NTF
	75mil		77mil
	100mil		84mil
	39mil	8mm-12mm height device	98.5mil	such size of test probe will cause more NTF
	50mil		98.5mil	such size of test probe will cause more NTF
	75mil		108.5mil
	100mil		118mil
	39mil	12mm-16mm height device	115mil	such size of test probe will cause more NTF
	50mil		118mil	such size of test probe will cause more NTF
	75mil		126mil
	100mil		133mil
	39mil	16mm-20mm height device	134.5mil	such size of test probe will cause more NTF
	50mil		138mil	such size of test probe will cause more NTF
	75mil		146mil
	100mil		153mil
	39mil	20mm above height device	144mil	such size of test probe will cause more NTF
	50mil		148mil	such size of test probe will cause more NTF
	75mil		155.5mil
	100mil		163mil
Nail to testjet (Test point center to testjet border distance)	39mil		34mil	such size of test probe will cause more NTF
	50mil		39mil	such size of test probe will cause more NTF
	75mil		47mil
	100mil		54mil
Nail to DIP pin (Test point center to device pin distance)	39mil		53mil	such size of test probe will cause more NTF
	50mil		58mil	such size of test probe will cause more NTF
	75mil		68mil
	100mil		77mil
Nail to tooling hole (Test point center to tooling hole border distance)	39mil		135mil	such size of test probe will cause more NTF
	50mil		140mil	such size of test probe will cause more NTF
	75mil		145mil
	100mil		150mil
Nail to board boby (Test point center to board border distance)	39mil		36mil	such size of test probe will cause more NTF
	50mil		40mil	such size of test probe will cause more NTF
	75mil		47mil
	100mil		54mil
Easy to pour parts,Within easy fall+safe distabce (Test point center to within easy fall)	39mil		113mil	such size of test probe will cause more NTF
	50mil		118mil	such size of test probe will cause more NTF
	75mil		126mil
	100mil		133mil