以文本方式查看主題 - 曙海教育集團(tuán)論壇 (http://www.hufushizhe.com/bbs/index.asp) -- Allegro Cadence PCB設(shè)計(jì) (http://www.hufushizhe.com/bbs/list.asp?boardid=42) ---- 轉(zhuǎn)一Cadence PCB 設(shè)計(jì)學(xué)習(xí)筆記二 (http://www.hufushizhe.com/bbs/dispbbs.asp?boardid=42&id=1905) |
-- 作者:wangxinxin -- 發(fā)布時(shí)間:2010-11-30 10:54:38 -- 轉(zhuǎn)一Cadence PCB 設(shè)計(jì)學(xué)習(xí)筆記二 通孔焊盤的設(shè)計(jì): 1、定義:類型Through,中間層(fixed),鉆孔Drill/slot(圓形,內(nèi)壁鍍錫plated,尺寸) 2、層的定義:BEGIN Layer(Top)層:REGULAR-PAD < THERMAL-PAD = ANTI-PAD END LAYER(同BEGIN,常用copy begin layer, then paste it) TOP SOLDERMASK:只定義REGULAR-PAD ,大于(Begin layer層regular-pad,約為1.1~1.2倍) BOTTOM SOLDERMASK(同Top soldermask,常用Top soldermask, then paste it) * Y% [\' n# c\' n; _8 A, k3 |0 b f* n 例1 //--------------------------------------------------------------------------------------- Padstack Name: PAD62SQ32D + ^\' y: r" L+ c: B5 w% O 1 ]- o# G* Z( C ]& \\ *Type: Through ) t+ e r; C\' G A* Q! D *Internal pads: Fixed + c$ }$ `: s" d$ z$ A7 j *Units: MILS Decimal places: 4 0 O8 A\' u4 e$ i Y$ |4 l& n Layer Name Geometry Width Height Offset (X/Y) Flash Name Shape Name 8 P1 Z4 g% s4 Y# E. x9 l2 K9 g% S ------------------------------------------------------------------------------------------------------------------ / P3 J6 S9 R6 _) ` *BEGIN LAYER *REGULAR-PAD Square 62.0000 62.0000 0.0000/0.0000 % D# j" o0 K3 z& Z) d *THERMAL-PAD Circle 90.0000 90.0000 0.0000/0.0000 *ANTI-PAD Circle 90.0000 90.0000 0.0000/0.0000 *END LAYER(同BEGIN,常用copy paste) * [) o" _2 j8 G( X DEFAULT INTERNAL(Not Defined ) *TOP SOLDERMASK *REGULAR-PAD Square *75.0000 75.0000 0.0000/0.0000 ) @7 S& `- k" ~) a2 k3 f. ]8 j *BOTTOM SOLDER MASK ) p4 l# }0 M) d8 w" |& u *REGULAR-PAD Square *75.0000 75.0000 0.0000/0.0000 TOP PASTEMASK(Not Defined ) BOTTOM PASTEMASK(Not Defined ) . G) F6 E% D: ?# e6 ]9 T! Q TOP FILMMASK(Not Defined ) 1 ]; Y( P/ X" c7 y4 `( N6 d, i4 H BOTTOM FILMMASK(Not Defined ) 9 p5 ?) o% O9 Z/ L, u9 U NCDRILL * P" Y4 n/ p3 m) d 32.0000 Circle-Drill Plated Tolerance: +0.0000/-0.0000 Offset: 0.0000/0.0000 DRILL SYMBOL * A3 T9 f& m; l! v2 o Square 10.0000 10.0000 - l5 R% |/ A! W; E4 I5 S, L ---------------------------------------------- 表貼焊盤的設(shè)計(jì): 3 R7 Y! }9 E( b" _ 1、定義,類型single,中間層(option),鉆孔(圓形,內(nèi)壁鍍錫plated,尺寸一定為0) ; Q6 ]6 Q Q8 R 2、層的定義:BEGIN Layer(Top)層:只定義REGULAR-PAD TOP SOLDERMASK:只定義REGULAR-PAD ,大于(Begin layer層regular-pad,約為1.1~1.2倍) 例2 ------------------------------------------------ $ R5 i# V- u& C1 a Padstack Name: SMD86REC330 *Type: Single *Internal pads: Optional *Units: MILS Decimal places: 0 9 z$ q% W; {- \\9 s: j, |1 u Layer Name Geometry Width Height Offset (X/Y) Flash Name Shape Name ------------------------------------------------------------------------------------------------------------------ *BEGIN LAYER *REGULAR-PAD Rectangle 86 330 0/0 THERMAL-PAD Not Defined ANTI-PAD Not Defined END LAYER(Not Defined ) 1 r( `! |6 g$ _ i4 l& A2 E q/ W DEFAULT INTERNAL(Not Defined ) *TOP SOLDERMASK *REGULAR-PAD Rectangle 100 360 0/0 5 ^4 P! j! p" o* B4 g- z BOTTOM SOLDERMASK(Not Defined ) TOP PASTEMASK(Not Defined ) / A F4 o% u, Y4 y/ q2 ^ BOTTOM PASTEMASK(Not Defined ) TOP FILMMASK(Not Defined ) BOTTOM FILMMASK(Not Defined ) $ l9 \\& {; D\' @) o NCDRILL(Not Defined ) " c6 V9 [; G" d; H9 Y DRILL SYMBOL # l0 b) V {6 S& \\- d" D) ~7 b Not Defined 0 0 ------------------------------------------ 9 X) O8 i. e" o% P* O6 @ K x 手工建立元件(主要包含四項(xiàng):PIN;Geometry:SilkScreen/Assembly;Areas:Boundary/Height;RefDes:SilkScreen/Display) - ~" i3 c+ a& l1 f\' I\' P7 w 注意:元件應(yīng)放置在坐標(biāo)中心位置,即(0,0) 1、File ew..package symbol ) `1 g1 g! L9 p& {% g 2、設(shè)定繪圖區(qū)域:SetupDrawing size...Drawing parameter... & b9 D) b N2 H8 i* i% p 3、添加pin:選擇padstack ,放置,右排時(shí)改變text offset(缺省為-100,改為100)置右邊 8 g% D, c6 @. J# ^5 y 4、添加元件外形:(Geometery) *絲印層Silkscreen:AddLine(OptionActive:package geometery;subclass:silkscreen_top) " x( _* W8 ]0 ?! O+ C *裝配外框Assembly:AddLine(OptionActive:package geometery;subclass:Assembly_top) 5、添加元件范圍和高度:(Areas) *元件范圍Boundary:SetupAreaspackage boundary....Add Line(OptionActive Classackage geometry;subclassackage_bound_top) ) d, \\2 r9 M1 ]! n2 h |